1. We have new knowledge of how charge can be transferred from one object to another
(water + balloon; balloon + wall; tape). How might that information help us explain the
differences we noticed when we tested the conductivity of deionized water, salt water, and
sugar water?

Answers

Answer 1

Charge can be transferred from one object to another in three way conduction, polarization, and friction

Whenever electrons are transferred between objects, neutral matter becomes charged and three ways this can occur are referred to as conduction, polarization, and friction conduction means when there is direct contact between materials that differ in their ability to give up or accept electrons when two different materials are rubbed together, there is a transfer of electrons from one material to the other material and this causes one object to become positively charged (the electron loser) and the other object to become negatively charged (the electron gainer)

Here given object is water + balloon; balloon + wall; tape then you rub a balloon against your clothes and it sticks to the wall, you are adding a surplus of electrons (negative charges) to the surface of the balloon the wall is now more positively charged than the balloon and we tested the conductivity of deionized water positively charged

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Related Questions

will mark brainliest if correct
What does it mean when two solid objects take up different spaces? (2 points)

Group of answer choices

They have different masses.

They have different volumes.

They have different temperatures.

They have different weights.

Answers

Answer:

THEY HAVE DIFFERENT VOLUMES

Answer:

They have different volumes

They have different masses

Explanation:

based on the information above and periodic trends, which of the following is the best hypothesis regarding the oxide(s) formed by rb?

Answers

The best hypothesis regarding the oxide(s) formed by Rb: Rb will form only Rb₂O, Rb₂O₂ and RbO₂.

Rubidium electron configuration:

₃₇Rb 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶5s¹; one valence electron is 5s¹ orbital.

Alkaline metals (group 1), in this example rubidium, have lowest ionizations energy and easy remove valence electrons (one electron), they are most reactive metals.

Alkaline metals have oxidation number +1.

The alkaline metals react with oxygen to form different oxides.

Rubidium like other alkaline metals, form oxide, peroxide and superoxide.

Rb₂O is rubidium oxide, it is a yellow solid

Rb₂O₂ is rubidium peroxide, it is produced when rubidium stands in air

RbO₂ is rubidium superoxide, it is a black solid

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Is the emission spectrum of elements composed of individually colored lines or is it a continuous blend of colors like a rainbow?

Answers

The emission spectrum of elements is composed of individually colored lines.

When energy is provided to an element, the electrons present in it get excited and move to a higher energy level.

When these electrons return to their ground state, they release energy in the form of colored bands known as a spectrum(plural; spectra).

The spectrum emitted by a substance that has absorbed energy is known as the emission spectrum.

To produce an emission spectrum, energy is supplied to a sample by heating it or irradiating it.

The study of spectra is known as spectroscopy which helps in the identification and characterization of elements.

The emission spectrum of atoms does not have a continuous blend of colors like a rainbow.

Thus, the emission spectrum of elements is composed of individually colored lines.

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If each oxygen atom represents 0.050 mol, how many molecules of dichlorine monoxide were present before the decomposition?

Answers

0.6 moles molecules of dichlorine monoxide were present before the decomposition.

Balanced chemical equation for reaction of gaseous dichlorine monoxide decomposes to chlorine and oxygen gases:

2Cl₂O → 2Cl₂ + O₂

n(O) = 12 × 0.050 mol

n(O) = 0.6 mol; number of oxygen atoms

n(O) : n(O₂); ratio of oxygen atoms to oxygen molecules (see the picture below)

n(O₂) = 0.6 ÷ 2

n(O₂) = 0.3 mol; amount of oxygen molecules

n(O₂) : n(Cl₂O) = 1 : 2; from balanced equation

n(Cl₂O) = 2 × 0.3 mol

n(Cl₂O) = 0.6 mol; amount of dichlorine monoxide

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Because ___ occurs without oxygen scientist believe this stage in cellular respiration evolved first

Answers

Because glycolysis occurs without oxygen scientists believe this stage in cellular respiration evolved first.

Glycolysis, which does now no longer require oxygen and is stated to have developed earlier than the opposite energy-generating tiers of cell breathing at a time while there has been no oxygen withinside the Earth's environment The first step is breathing, which is anaerobic and does now no longer require oxygen.

Glycolysis happens withinside the cytosol of the cellular and does now no longer require oxygen, while the Krebs cycle and electron shipping arise in mitochondria and require oxygen.

The first step in cell breathing, glycolysis, happens withinside the cytoplasm of the cellular. A glucose molecule is damaged down into molecules of pyruvate (pyruvate).

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Explain the technique for measuring the freezing point of a solution. why is salt added to the ice?

Answers

Technique that are used to measure the freezing point of a solution is the osmometer it uses the solution's freezing point depression to put up its brawn. It is used to manage the level of osmotically felicitous body fluid in a lot of chemicals mixed in the blood operate the relationship which a mole of mixed substance lessen the freezing point of water(H2O) by 1.86 °C (35.35 °F).

The Rast method is also there.

Beckmann thermometer

When added to ice, salt first bring to an end in the film of liquid water that is always near by on the surface, thereby clouded its freezing point below the ices temperature. Ice in contiguity with salty water therefore melts, produce more liquid water, which mixed more salt, thereby lead to more ice to melt, and so on.

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chelsea went ice-skating. the ice, her skates, the zamboni, and the rink building itself were all examples of solids she encountered. she developed a model of the particles in the ice. which of these statements about the particles present in her model of a solid are true? choose the three statements that apply.

Answers

The three statements about a model of the particles in the ice:

They vibrate in place.

They are packed very closely together.

They cause the solid to have definite volume and definite shape.

For example, chemical compound water (H₂O) is liquid. Molecules of water are not rigid as in solid state (ice) and can move. In solid state (in this example ice) movement of molecules is more slow than movement of molecules in liquids (for example water).

Solids have fixed shapes and volumes because particles occupy a fixed position in the crystal lattice.

Strong cohesive forces keep particles (molecules, atoms, or ions) in place, with little void spaces, resulting in very low compressibility and thermal expansion.

Solids have high density that varies very little with temperature.

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The sequence of amino acid residues in a protein is considered _____ structure and is always read from the _____-terminal end of the protein.

Answers

The sequence of amino acid residues in a protein is considered primary structure and is always read from the N-terminal end of protein.

The food we eat chiefly consists of three nutrients namely carbohydrates, proteins and fats.

Proteins are the most abundant among the bio molecules present in the living organisms.

The word protein is derived from Greek word, “proteios” which means primary or of prime importance.

The proteins are the polymers of amino acids.

The structure of amino acid consists of a carbon atom surrounded by four functional groups i.e, Carboxyl(COOH) group, the Amino(NH2) group, hydrogen(H) and an alkyl group(R).

In a protein, amino acids are linked to each other by peptide bonds which are formed between the COOH group of one amino acid and the NH2 group of another amino acid, as shown in the adjoining image.

In primary structure, the amino acids are joined to each other in a linear manner without any branching, as shown in the given diagram.

Hence, the sequence of amino acid residues in a protein is considered primary structure and is always read from the N-terminal end of protein.

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Why do you think the mass was lost when the reaction was done in the normal setup but stayed the same when the reaction was done in the gas collection setup?

Answers

The mass was lost when the reaction was done in the normal setup but stayed the same when the reaction was done in the gas collection setup because of the law of conservation of mass.

The law of conservation of mass states that -

Mass can neither be created nor destroyed or lost, in any reaction. It remains constant in a system.

So, the mass lost in surrounding was neither got considered nor  got calculated when the reaction setup was done in normal way. But when the reaction was done in a closed setup where after the reaction, the gas was collected, the mass was changed. It proved the postulate stated by the law of conservation of mass and energy.

Therefore, it is explained by the law of conservation of mass.

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How many ionized amino groups will be found in the tripeptide ser-ala-lys at ph 7?

Answers

The four amino acids can come together in any way. 34 x 81 = 81 different combinations are conceivable.

What is ionized amino ?

Aspartic acid and glutamic acid are the two examples where the side chain further contains a carboxylic acid group to the one adjacent to the amino group. When the pH is close to neutral (pH 7), these groups get ionised and manifest themselves as the carboxylate anion.

The concentration of H+ ions and acid strength increase in direct proportion to the degree of dissociation (or ionisation). As a result, the degree of an acid's dissociation or ionisation is directly related to the acidity of the acid (stronger acids have lower pH values).

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A 28.0 g sample of nitrogen gas combines completely with 6.0 g of hydrogen gas to form ammonia. What is the mass of ammonia formed?​

Answers

Taking into account the reaction stoichiometry, the mass of ammonia formed is 34 grams.

Reaction stoichiometry

In first place, the balanced reaction is:

N₂ + 3 H₂ → 2 NH₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

N₂: 1 moleH₂: 3 molesNH₃: 2 moles

The molar mass of the compounds is:

N₂: 28 g/moleH₂: 2 g/moleNH₃: 17 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

N₂: 1 mole ×28 g/mole= 28 gramsH₂: 3 moles ×2 g/mole= 6 gramsNH₃: 2 moles ×17 g/mole= 34 grams

Mass of ammonia formed

In this case, by reaction stoichiometry, a 28.0 g sample of nitrogen gas combines completely with 6.0 g of hydrogen gas. So, the mass of ammonia formed is 34 grams.

In summary, by reaction stoichiometry, the mass of ammonia formed is 34 grams.

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Two+isotopes+of+rubidium+occur+naturally,+rubidium+85+(84.91+amu)+at+72.17%+and+rubidium-87+(86.91+amu)+at+27.83%.+what+is+the+atomic+mass+of+rubidium?

Answers

Two isotopes of rubidium occur naturally, rubidium 85 (84.91 amu) at 72.17 % and rubidium 87 (86.91 amu) at 27.83 %. The atomic mass of rubidium is 85.468 μ.

To find the atomic mas of rubidium -

Determining the average atomic mass of an element, we take the average weight of the atomic masses of the naturally occurring isotopes. This means that all the isotopes together are calculated by multiplying the atomic mass and the percentage of abundance. So we have a sum of all the different isotopes ( which is 100 % of abundance)

For naturally occurring rubidium, there are 2 isotopes.

mass of Rb-85 x abundance + mass of Rb-87 x abundance -

84.9118 x 0.7217 + 86.9092 x 0.2783 = 85.46767642 = 85.468 μ

On the periodic table, we can see for Rubidium

85.468 μ which is the average atomic mass of Rubidium and also for its two naturally occurring isotopes.

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A student in chm 11500 lab measured the mass of a 250-ml erlenmeyer flask and recorded it as 79. 83 g. She added 10. 00 ml of deionized water from a 25-ml buret to the flask. The mass of the flask plus the water was 89. 82 g. The temperature of the water was 22 °c. What is the calculated volume of the water that the student measured?.

Answers

An Erlenmeyer flask is also termed as conical flask and titration flask. Invented in the year 1860. It is made up of glass and plastic. Inventer - Emil Erlenmeyer

Weight of empty erlenmeyel flask = 79.83 g

Weight after addition of water = 89.82 g

Weight of water = 89.82 - 79.83 = 9.99 g

Density of water at 22 deg celcius = 0.99777

Density = mass / volume

Volume = mass / density

= 9.99 g / 0.99777 g/ ml

= 10.01 ml

Calculated volume of water that the student measured is 10.01 ml.

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Assuming a density of 1.00 g/ml what is the total mass of the solution (water) in the calorimeter?

Answers

If we assume the density of water is 1.00 g/mL, the mass of water is 250 g

To find mass here density is given so we use density formula density=mass/volume

The volume of water is given but not the mass. Hence volume is converted into mass by using the density of water, which 1.0 g /ml. Therefore, Mass of water = 250 ml x 1.0 g/ml = 250 g

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Have you ever tried eating delicious delicacies served in your school canteen during recess time? Have you ever thought of how these foods were prepared in such a way that various ingredients were mixed to make it delicious and healthy? The combination of several components or elements produce a useful end product that can be utilized and consumed for our advantage.​

Answers

Yes, I have tried eating delicious delicacies served in the school canteen during recess time.

The food that is served in the school canteen is either cooked or in raw form.For example, I ate a vegetable sandwich and a banana smoothie for lunch. Cucumber and tomato are the sandwich's ingredients. We had bread, butter, salt, cheese, and cabbage. Bananas, milk, and sugar are all components of the banana milkshake. the cucumber has vitamin C. While tomatoes also contain vitamin C, cheese has lipids, and Banana has carbohydrates and these all components are good for health.Energy is what carbs are mostly used for, but they also aid to control blood sugar levels. While proteins are the building blocks of the body, stable lipids primarily aid in the storage of energy and the communication of information to cell membranes.

The combination of these components in food produces different end products like vitamins, minerals, and many other nutrients which are beneficial for a healthy body.

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Banded iron formations are made of the minerals ______ and ______.

Answers

Banded iron formations are made of minerals like iron-rich silicates and iron-rich carbonates.

What is banded iron?

Banded iron is the sedimentary rocks that are formed by the iron-rich contents and iron-rich carbonates and silicates. These minerals are hematite and magnetite.

The organisms that release oxygen are converted into iron oxides underwater, and they form sedimentary rocks like banded iron. The oxides are composed on the ocean floor, and they turn into rocks.

Thus, the correct minerals for banded iron formation are iron-rich silicates and iron-rich carbonates.

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In recent years the number of buildings with solar panels has greatly interested. Solar panels reduce the amount of carbon dioxide released in the atmosphere ​

Answers

The carbon footprint of a solar panel is around 20 times lower than that of a coal-powered electrical source. As a result, as soon as you install solar power in your home, your carbon footprint will go down.

As we work to make the planet greener, solar carbon footprints are a hot topic in the field of renewable energy. Even if solar energy reduces carbon emissions in thousands of homes every day, the manufacture of solar panels can have a sizable impact on the environment.

In this article, the carbon footprints of solar panels and the amount of CO2 saved by solar energy will be compared. solar emissions and their alternatives, solar footprints, and some modern approaches to reducing carbon footprints.

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A solar panel's carbon footprint is around 20 times smaller than that of a coal-powered electricity source.

Installing solar panels is an excellent strategy to reduce your carbon impact. Solar energy is a natural, renewable source since it can be renewed instead of finite fossil fuels. When solar energy is turned into electricity, it emits little or no pollution.Solar panels, like any produced product, have a carbon footprint. The good news is that the industry has been hard at work to reduce this as much as possible, perfecting everything from materials to manufacturing. Solar panels' efficiency has grown over the previous decade, and solar photovoltaics (PV) has had the steepest cost decrease of any power technology. A 4kW solar PV system cost around £20,000 in 2010.

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True or false risk is defined as an inherent chemical or physical characteristic

Answers

It is False that risk is defined as an inherent chemical or physical characteristic.

Risk is the probability that a person if exposed to a hazard will experience( or get harmed)  an adverse health effect, it also goes with situations with equipment of property loss or harmful effects on the environment.Many factors influence the degree of risk such as the nature of exposure, the severity of the effect,  how the person is been exposed, and so on.

Whereas the hazard word has a confusing definition, it refers to a physical or chemical characteristic that has the potential for causing damage to property, people, or the environment. Most of the time hazard gets combined with the word Risk.

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A 10 mg mosquito-sized insect needs a mere millimeter of total foot edge to be supported by surface tension. how about a 60 kg man?

Answers

A 60 kg man would need a 8000 meters of total foot edge to be supported by surface tension.

Many insects can walk on the water, because of the surface tension at the water surface.

Surface water molecules attract more strongly to the water molecules around them and create a high surface tension with smaller surface area of a water.

The water molecules at the surface do not have other water molecules to form hydrogen bonds, only below and to either sides, like other water molecules that hydrogen bond with other water molecules on all sides.

The surface tension at the water surface is not strong enough to support man on the water.

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Explain hydrogen bonding. how many hydrogen bonds can a single water molecule form

Answers

Hydrogen bonding is a unique type of dipole-dipole enchantment among molecules, now not a covalent bond to a hydrogen atom. It results from the attractive pressure between a hydrogen atom covalently bonded to a very electronegative atom consisting of a N, O, or F atom and some other very electronegative atom.

A single water molecule can form 4 Hydrogen Bonds.

A hydrogen atom this is linked to a exceptionally electronegative atom and some other relatively electronegative atom that is nearby engage with each other to form hydrogen bonds, which are an unique kind of attractive intermolecular interactions. This system is known as hydrogen bonding. Hydrogen, as an example, is covalently related to the more electronegative oxygen atom in water molecules (H2O).

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In atom has 11 protons, 12 neutrons, and 10 electrons. this atom has an atomic number of ______, an atomic mass of ________, and an overall charge of ______.

Answers

In atom has 11 protons, 12 neutrons, and 10 electrons. this atom has an atomic number of 11 , an atomic mass of 23 , and an overall charge of +1 .

What is electron?

Unattached or attached to an atom, an electron is a negatively charged subatomic particle (not bound). One of the three main types of particles inside an atom, along with protons and neutrons, is an electron that is linked to the atom.

An atom's nucleus is made up of electrons, protons, and neutrons. The positive charge of a proton balances out the negative charge of an electron. An atom is in a neutral state if its protons and electrons are equal in number.

They have a mass that is considerably lower, exist outside of the nucleus, and display both wave- and particle-like properties. Since an electron is also a fundamental particle, it is unreinforced and unbroken.

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Which molecule in each pair has the greater dipole moment? give the reason for your choice. a) so2 or so3

Answers

SO2 has a larger dipole moment than SO3 molecule in each pair has the greater dipole moment

Dipole moment (μ) measures the net molecular polarity, which is the product of charge Q and the distance r between the charges μ=Q×r thus, the larger the difference in electronegativities of bonded atoms, the larger the dipole moment. the SO3 molecule has zero dipole moment SO3 (sulfur trioxide) molecule has the highly symmetrical trigonal planar geometry and each one of the individual S-O bond in the species is equally polar. trigonal planar with each O double bonded to S. so no dipole moment inSO3.

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A. Graph the following information in a BAR graph. Label and number the x and y-axis appropriately.
y
Month
Sept
Oct
Nov
Dec
Jan
Feb
# of deer
38
32
26
20
15
12
X

Answers

The quantity of deer is a dependent variable, whereas time is an independent variable.

Independent variable is the variable whose value doesn't depend on other variable.The independent variable is time(months)The dependent variable is number of deer.The appropriate title is variations in deer population in given time period.A variable is said to be independent if it does not depend on any other variable to determine its value. A variable is said to be independent if it does not depend on any other variable to determine its value. A variable that indicates a quantity being altered in an experiment is known as an independent variable. A quantity whose value depends on such modifications is referred to as a dependent variable. The independent variables in the context of a function are the function's inputs, while the dependent variables are the function's outputs.

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Contrast mass, volume, and density.

Plss need help asap

Answers

The density is the ratio of  the mass to the volume.

What is density?

The term density refers to the ratio of mass to the volume of a substance. Given that mass is the quantity of matter in a body, we could use it to obtain the density of the body.

We know that solids have a definite volume, liquids have a definite volume but a gas does not have a definite volume. The volume of a gas is the same as the volume of the container where it is kept. This is why gases could be compressed but a solid and a liquid can not be compressed likewise.

The volume tells us how much space that an object expects to occupy. We have to combine the mass and the volume to get the density of an object. As such, we can see that the density is the ratio of  the mass to the volume.

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Hydrogen and helium, the two main constituents of the sun, are both ______ elements.

Answers

The two main constituents of the sun, are both lightweight elements.

What is constituents of the sun?

Helium and hydrogen make up the majority of the sun's mass (He). The sun is made up of 92.1% hydrogen and 7.9% helium by mass. Less than 0.1 percent of the mass of the sun is made up of different metals. The surface of the sun is around 10,340 degrees Fahrenheit hot (5,726 degrees Celsius).

The majority of the sun's emissions come from particles like neutrinos that travel beyond the light the sun's surface emits and can't be seen with ordinary spectroscopic instruments. As a result, to identify these particles, specialised equipment were needed, such as the Super Kamiokande (Kamioka Observatory, Japan), which has incredibly sensitive light sensors. These particles provided evidence that nuclear fusion processes were taking place in the Sun's core, which is what caused their emission.

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What was collected in the sample for chemical analysis? what was concluded from the results of this experiment?

Answers

Miller performed the chemical analysis experiment and collected samples of several organic compounds ( like formaldehyde and hydrogen cyanide) and other complex molecules like amino acid that were called as hydrocarbons.

Miller concluded from the experiment that the early stage in the origin of life could have been supported by the abiotic synthesis of organic compounds.

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Which answer contains the substances known as fossil fuels?



Which answer contains the substances known as fossil fuels?


wood, oil, geothermal


oil, natural gas, coal


wind, oil, coal


natural gas, solar, coal

Answers

oil, natural gas, coal..........

Answer:

Coal, oil, and natural gas

Explanation:

Coal is a material usually found in sedimentary rock deposits where rock and dead plant and animal matter are piled up in layers.

A certain sample of liquid has a mass of 42 grams and a volume of 35 centimeters. What is the density of the liquid?

Answers

A certain sample of liquid has a mass of 42 grams and a volume of 35 centimeters. The density of the liquid is 1.2 g.cm⁻³

How can I determine a liquid's density?

You follow the same procedures you would for a solid to determine the density of a liquid. Divide the mass of the fluid by its volume after computing its volume and weight. Weigh the substance inside the container, then pour it out and weigh the resulting empty vessel. The weight of the empty container is subtracted from the weight of the filled container to determine the fluid's mass.

Calculation of the above problem

Mass  =  42gms

Volume  =  35 cm³

Formula Used:

Density  =  Mass ÷ Volume

Putting values,

Density  =  42 g ÷ 35 cm³

Density  =  1.2 g.cm⁻³

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Both of the sulfur-chlorine single bonds in scl2 are polar. in which direction should the polarity arrows point?

Answers

The polarity arrow should point away from the central sulphur atom.

A polarity arrow indicates the direction of the atom with the greater electronegativity.

Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

An electron configuration of sulfur atom: ₁₆S 1s²2s²2p⁶3s²3p⁴

An electron configuration of chlorine atom: ₁₇Cl 1s² 2s² 2p⁶ 3s² 3p⁵

In the molecule SCl₂, a chlorine (λ=3) is more polar than a sulfur (λ=1.8).

An arrow points from sulfur (S) toward chlorine (Cl), since it has a greater electronegativity than sulphur (see the picture below).

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Mobile water supply operations, such as water shuttles or relay pumping, must be performed:_____.

Answers

Mobile water supply operations, such as water shuttles or relay pumping, must be performed In rural areas without public water distribution systems

A distribution systems includes all of the centers and devices connecting a transmission device to the customer's device. A traditional distribution device can consist of: Substations. Distribution Feeder Circuits. Switches.

Distribution systems, additionally referred to as dispensed computing, is a device with more than one additive placed on extraordinary machines that speak and coordinate movements so that it will seem like an unmarried coherent device to the end-user.

A dispensed device is computing surrounding wherein diverse additives unfold throughout more than one computer (or different computing gadgets) on a network. These gadgets cut up the work, coordinating their efforts to finish the task extra effectively than if an unmarried tool were accountable for the task.

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It is said that rather than focus primarily on behavioral interaction sequences, experiential family therapists focus more on the __________ layer of those interactions The ancient egyptian artist who painted the journey of the sun god re on a coffin chose hsi subject becuase? can a person belong to more than one culture, or are they neglecting their original identity when adapting to a new culture? Mike and ted are newborns. mike's mother finds his sucking reflex to be strong, while ted's mother worries that his sucking reflex is weak. this difference signals that? The constellation hercules, named after an ancient greek mythical hero. Page from a 1430 copy of the book of fixed stars, an astronomy book written by a tenth-century muslim scientist Help please i do not understand................ 6. Hydrogen bonds are also known as Which of the following best describes the reaction seen below?2H2(g) + O2(g) 2H2O(l) a. Two grams of hydrogen gas combine with 1 gram of oxygen gas to form 2 grams of water. b. Two molecules of hydrogen gas combine with 1 molecule of oxygen gas to form 2 molecules of water. c. Two liters of hydrogen gas combine with 2 liters of oxygen gas to form 2 liters of water. d. Two hydrogen atoms combine with 1 oxygen atom to form 2 water molecules. The speed of a mortorcycle increases from 10 km/hr in 9 seconds. whats is its acceleration? What does a 'right to know' mean? Will regional subcultures become more or less distinct over the next 20 years? why? Write down three examples of matter in a liquid state.Write down three examples of matter in a solid state.Write down three examples of matter in a gas state. Microsoft charges a price of $599 for a copy of windows 7. Is this pricing decision rational?. A projectile moves in two dimensions - both horizontally and vertically. Since these two components of motion are independent of each other, two distinctly separate sets of equations are needed Define Each Variable Ecology includes studying ecosystems at different levels. arrange these levels from the narrowest, most specific level to the widest, broadest level. place the narrowest level on top. If a consumer wants to file a deceptive ad complaint, which entity should be contacted? A disinfectant was added to a culture of bacteria containing 20,000,000 cfus per milliliter to start. since the d value of the disinfectant is 1 minute and 20 seconds, there will be:_________ Thirteen-year-old melissa's blood tests indicate testosterone levels twice as high as last year and estradiol levels eight times higher than last year. melissa is most likely experiencing? The nerves of the somatic nervous system connects to which two parts of the body? a. motor muscles and chemical receptors b. heart muscles and sensory receptors c. cranial muscles and motor receptors d. skeletal muscles and sensory receptors please select the best answer from the choices provided a b c d 7+ [1 + (36+5)] 2