Imagine a solution containing only water, sodium, and glucose. if a voltage is applied to the solution, there would be no net movement of glucose
The given declaration is wrong. Glucose answers aren't electrolytes and consequently do now no longer behavior power. Is sodium chloride an awesome conductor of power? Simply with the aid of using dissolving or dissolving it in water, it can not behavior power as a solid.
Saline includes Na+ and Cl- ions. If ions are gifted withinside the answer, those ions can pass thru the answer and convey an electric-powered current. Pure water and sugar answers do now no longer include widespread ions. glucose molecules do now no longer smash down into ions whilst dissolved.
When glucose is introduced to water, it dissolves without difficulty however now no longer dissociates into ions. Therefore, a glucose answer isn't an electrolyte and isn't a conductor of power.
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How many covalent bonds are predicted for an atom of si? enter your answer in the provided box.
Covalent bonds predicted from an atom of Silicon (Si) are Four covalent bonds.
Covalent bonds are generally formed by the non-metals. These bonds are formed when electrons are shared between the atoms. To know the number of covalent bonds in any atom, you must know the number of valence electrons.
Those elements which belong to the period 2 forms covalent bond as-
8 - number of valence electrons.
Those elements which are from period 3, they form covalent bonds exactly same as the number of valence electrons.This is because d-orbitals are present in the period.
Silicon is the 14th element which belong to period 3. The electronic configuration of 1s² 2s² 2p⁶ 3s² 3p²
Just like Carbon (C), Silicon (Si) is tetravalent in nature, which means that it can easily share all four of its valence electrons and form covalent bonds. To become stable, Silicon(Si) will form four covalent bonds.
Silicon has four valence electrons, so it will form four covalent bonds.
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When a protein of 50 nanometers is mixed with water the opaque result is called a(n):_____.
When a protein of 50 nanometers is mixed with water, the opaque result is called a: suspension.
A suspension is a heterogeneous combination of two or extra substances. In it, the particles are suspended for the duration of the solution in bulk and can be easily viewed by means of bare eyes.
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3. draw the lewis structure for these anions. each anion is a conjugate base of an acid. (e) hco3─ (h attached to one of the o’s) (f) so32─
The lewis structure for these anions are-
a fairly straightforward manner to visualize a molecule's valence shell electrons is through a Lewis structure. It gives insight into the pairing and association of the electrons surrounding every atom in the molecule.
every electron inside the Lewis dot structure can be represented via a dot, and a line connecting the dots is drawn to shape an electron bond.
simplest the valence electrons are taken under consideration whilst sketching the Lewis dot shape, ignoring the electrons that don't belong to the outermost shell.
The Lewis shape is the most effective and maximum constrained speculation; it does no longer describe how bonds are created or how electrons are disbursed most of the atoms. And that is visible as the essential constraint at the Lewis shape.
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If a yellow paint is to have 0.511% pbcro4 by mass, how many grams of chromite are needed per kilogram of paint?
Yellow paint has 0.511 % PbCrO4 by mass
Mass of PbCrO4 in 1 kg of paint = (0.511 / 100) * 1 kg = 0.00511 kg = 5.11 g
Moles of PbCrO4 = 5.11 g/ 323.19 g/mol
= 0.0158 moles
Moles of K2CrO4 also = 0.0158 moles
Moles of FeCr2O4 = 0.0158 moles K2CrO4 * (4 mole FeCr2O4 / 8 moles K2CrO4)
= 0.0079 moles
Mass of FeCr2O4 (chromite) = 0.0079 moles * 223.83 g/mol
= 1.77 g
Paints are divided into two types: oil-based paints and water-based paints. Oil paints are usually used as a primer, undercoat, and topcoat. In the past, we relied heavily on oil-based paints for surface durability and longevity, but today water-based paints are on par. It is used for prolongation and acts as a barrier against environmental influences. Paint consists of pigments, solvents, resins, and various additives. Pigments give the paint its color. Solvents make application easier. The resin helps dry. Additives range from fillers to antifungals. There are hundreds of different natural and synthetic pigments.
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1 Samples of four gases are released in a room at the same time.
The gases are carbon dioxide, CO₂, hydrogen chloride, HCl, hydrogen sulfide, H₂S, and nitroge
dioxide, NO₂.
Which gas diffuses fastest?
Answer:
H2S
Explanation:
The gas with the smallest molar mass diffuses the fastest (assuming that the holes are the same size and that gasses act ideally).
Find the molar mass of each of the gasses, and then compare.
CO2 = 12 + 16 + 16 = 32 + 12 = 44
HCl = 35.45 + 1 = 36.45
H2S = 1 + 1 + 32 = 34
NO2 = 14 + 16 + 16 = 32 + 14 = 46
Therefor, H2S diffuses the fastest, then HCl, then CO2, and finally NO2
an electrical conductor is in a strong magnetic field. how is the conductor affected if it is connected to a battery so that current flows through the conductor?
When placed in a magnetic field, a current-carrying conductor experiences a mechanical force that can cause the conductor to move.
How does the magnetic field impact current?
Current and magnetic force are directly inversely connected in a homogeneous magnetic field for a straight current-carrying wire. As a result, the force is inversely related to the size of the current. This translates to: If the current is doubled, the force on the conductor will also double.
How do the fields of electricity and magnetism interact?Electric fields are created by differential voltages; the stronger the voltage, the stronger the resulting field. Magnetic fields are produced by electric current, and the stronger the current, the stronger the magnetic field. There will always be an electric field present even when there is no current flowing.
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What are the base units for distance, mass, time and volume in the metric system? What are
some units for these in the Standard English System?
Answer:
Explanation:
All of the following are duties of United States citizens EXCEPT:
A.
understanding their rights
B.
taking education seriously
C.
understanding what it means to be an active citizen
D.
learning about and understanding foreign governments and laws
Please select the best answer from the choices provided
A
B
C
D
Answer:
The kilogram, meter, and second are the fundamental base units upon which the metric system is built, but seven units of measure are defined from which all the other units are derived: Kilogram: The kilogram (kg) is the base unit of mass. Meter or Metre: The meter (m) is the unit of length or distance.
Explanation:
The two main sets of English units were the Winchester Units, used from 1495 to 1587, as affirmed by King Henry VII, and the Exchequer Standards, in use from 1588 to 1825, as defined by Queen Elizabeth I.
Why is acid added to water first
Answer: because acid and water react in a vigorous exothermic reaction, releasing heat, sometimes boiling the liquid.
Approximately how much heat in kj was released from the combustion of the 1-g sample?
Approximately, 21 kJ was released from the combustion of the 1-g sample.
Define Heat. What is the SI unit of Heat?Because heat is a type of energy, the SI unit for heat is also joules (J), which is defined as the quantity of energy required to increase the temperature of a given mass by one degree. This is significant because heat is a form of energy. Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred. The joule is the S.I. unit for heat.
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4. Which of the following careers requires the study of chemistry? (Choose all that apply)
1. Pharmacist
2. Doctor
3. Nurse
4. Science teacher
The energy for the phosphorylation of adp by atp synthase is powered directly by:_____.
The energy for the phosphorylation of ADP by ATP synthase is powered directly by H+ concentration across the membrane holding ATP synthase.
Phosphorylation: A biochemical process involving the addition of phosphate to an organic compound. Examples include the addition of phosphate to glucose to produce glucose monophosphate and the addition of phosphate to adenosine diphosphate (ADP) to form adenosine triphosphate (ATP).
Phosphorylation plays an important role in the regulation of many cellular processes including cell cycle, growth, apoptosis, and signaling pathways. Phosphorylation is the most common mechanism used to regulate protein function and transmit signals throughout the cell. Glucose phosphorylation maintains the downward gradient of glucose metabolism and extramitochondrial glucose flux via the pentose phosphate pathway. Induction of the pentose phosphate pathway and generation of NADPH may also help prevent cell death.
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A package of chocolate instant pudding contains 2640 mg of sodium. how many grams of sodium are in the pudding?
Answer:
2.640
Explanation:
Rounding to the nearest whole number would be 3 if that is needed.
2.0 moles of a monatomic ideal gas undergoes an isobaric process in which the temperature changes from 260 k to 320 k. what is the change in the internal energy of the gas?
The change in the internal energy of the gas is 1.5×10∧3 J.
The internal energy of an ideal gas is directly proportional to the temperature of the gas:
ΔE = 3/2 × n × R × ΔT
ΔT = 320 K - 260 K
ΔT = 60 K; change of the temperature
n = 2.0 mol: amount of a monatomic ideal gas
R = 8.1 J/mol×K;the ideal gas constant
ΔE = 3/2 × 2 mol × 8.1 J/mol×K × 60 K
ΔE = 1500 J
ΔE = 1.5×10∧3 J; the internal energy of the gas
Isobaric process is a type of process in which the pressure of the system stays constant.
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Which element forms easily into thin sheets?
O carbon
O helium
O gold
O bromine
Most americans overconsume? calcium. fiber. added sugars. potassium.
Most americans overconsume calcium. fiber. added sugars. potassium because in calcium, fiber added sugars, potassium has an healthy and nutrition food and it does't cause diseases.
Adequate intake of calcium is necessary for bone health as well as for basic biological functions such as nerve transmission, vasoconstriction, vasodilation, and muscle contraction. adequate potassium intakes are associated with optimal blood pressure and may reduce the risk of developing kidney stones and bone loss. fiber may protect against cardiovascular disease, obesity, and type 2 diabetes, and it is essential for digestive health. that's why most american's overtake this calcium, fiber added sugars, potassium
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what is 1.0 x 10^-10 in standard form?
The given number is can be written in standard form as 1 times 10 to power negative 10 ( 1 x 10⁻¹⁰).
What is standard form?A standard form is a form of writing a given mathematical concept like an equation, number, or an expression in a form that follows certain rules.
The given number = 1.0 x 10^-10
The given figures can be written in standard form as follows;
1.0 x 10^-10 = 1 x 10⁻¹⁰
Thus, the given number is can be written in standard form as 1 times 10 to power negative 10 ( 1 x 10⁻¹⁰).
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In a combination circuit, to identify series and parallel elements, you should _____.
Convert 1.9 kJ into the following units:
a. calories [answer: 450 cal]
b. Joules [answer: 1,900 J]
please show me the work, thank youu
Conevrting 1.9 kilojoule(kJ) into:
a) 1.9 kJ = 450 cal
b) 1.9 kJ = 1900 J
Similar to how kilometers measure distance, a kilojoule is a unit used to measure energy. Some nations continue to utilize the Calories (Cal) system, which was once used to quantify food energy. These are the conversions: 1 kJ = 0.2 Cal.
A calorie is a unit of energy measurement. Typically, the energy content of meals and beverages is determined in terms of calories. You must consume fewer calories each day than your body uses up in order to lose weight. Calories are necessary for human survival. Without energy, the body's cells would die, the heart and lungs would stop pumping, and the organs wouldn't be able to carry out essential life tasks. Through their consumption of food and liquids, people can absorb this energy.
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Why are the properties of a compound different than the elements that make it up.
The houses of compounds are one-of-a-kind and in a few instances very one-of-a-kind, from the ones of the factors that compose them. This is because Elements combine compounds to grow to be absolutely one-of-a-kind materials with specific houses.
Elements combine may be chemically blended into compounds, therefore, a compound includes extra factors blended, in exact proportions, with the aid of using chemical means. Compounds can be shaped with the aid of using combining atoms in their constituent factors with the aid of using ionic bonds or with the aid of using covalent bonds.
An Elements compound is a completely unique substance that paperwork while or extra factors integrate chemically. A compound usually includes the identical factors withinside the identical ratio. If the identical factors integrate into one-of-a-kind ratios, they shape one-of-a-kind compounds. Types of compounds encompass covalent and ionic compounds.
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If this molecule of dna originated as a linear molecule with a linking number (l) of 30, which was then circularized and unwound, the l for the unwound circular molecule would be ________.
If this molecule of dna originated as a linear molecule with a linking number (l) of 30, which was then circularized and unwound, the l for the unwound circular molecule would be 28.
As unwound circular DNA would result in a reduction of 2 linking numbers, the answer should be 28, since the linking number is constant for a closed supercoiled DNA molecule.
30 - 2 = 28
What is DNA molecule made up of?
Nucleotide molecules are the building blocks of DNA. Each nucleotide consists of three parts: a sugar molecule, a nitrogen base, and a phosphate group, which is made up of one phosphorus atom bound to four oxygen atoms. The "letters" that make up the genetic code of our DNA are adenine (A), thymine (T), guanine (G), and cytosine (C), which are the four different types of nitrogen bases.
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The web's ______ advantage allows for data and resource sharing that enables communication with a website.
The web's connectivity advantage allows for data and resource sharing that enables communication with a website.
In our daily lives, communication helps us build relationships by allowing us to share experiences and needs and connect with others. It is the essence of life that allows us to share We all need to communicate.
In our daily lives, communication helps us build relationships by allowing us to share experiences and needs and connect with others. It is the essence of life that can be shared. We all need to communicate. Effective communication results in a sense of satisfaction and accomplishment for all involved. Clearly communicating your message leaves no room for misunderstandings or message changes, and reduces the chance of conflicts.
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Ramelteon is a hypnotic agent used in the treatment of insomnia: what is the molecular formula of this compound? enter your answer in form of cxhynzow
Ramelteon is a hypnotic agent used in the treatment of insomnia. The molecular formula of this compound is C16H21NO2.
The molecular formula is the number of elements that are present in a compound. The molecular formula is calculated in terms of the empirical formula since the empirical formula is just the same or a multiple of the molecular formula.
The formula is :
n=M/mass of the empirical formula
Where,
M is the molar mass and n is an integer.
For example, the molecular formula of Caffeine C8H10N4O2 and its empirical formula is C4H5N2O.
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Acetyl-coa enters the citric acid cycle by reacting with ________ to form ________.
Acetyl-CoA enters the citric acid cycle by reacting with oxaloacetate to form citrate.
Acids are molecules or ions that can donate protons, known as Bronsted-Lowry acids, or form covalent bonds with electron pairs, known as Lewis acids. The first category of acids is proton donors or Brønsted-Lowry acids.
There are two main types of acids: organic acids and inorganic acids. Inorganic acids are sometimes called mineral acids. As a category, organic acids are often weaker than inorganic acids. The basic difference between the two is that organic acids contain carbon whereas inorganic acids do not. Natural Acids: These acids are found in foods. For example, acetic acid, tartaric acid, and lactic acid. Mineral or Inorganic Acids: These acids are used in various laboratory processes such as hydrochloric acid, and sulfuric acid.
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Q1. A student investigated the law of conservation of mass
The law of conservation of mass states that the mass of the products is equal to the
mass of the reactants.
This is the method used.
1. Pour lead nitrate solution into a beaker labelled A.
2. Pour potassium chromate solution into a beaker labelled B.
3. Measure the mass of both beakers and contents.
4. Pour the solution from beaker B into beaker A
5. Measure the mass of both beakers and contents again.
When lead nitrate solution and potassium chromate solution are mixed, a reaction takes
place.
This is the equation for the reaction:
Pb(NO₂)(aq) + K.CrO.(aq)
(a). -> PbCrO.(s) + 2KNO.(aq)
Beaker A and contents before mixing: 128.71g
Beaker B and contents before mixing: 128.97g
Beaker A and contents after mixing: 154.10g
Beaker B after mixing: 103.58g
Show that the law of conservation of mass is true.
Use the data from the table above.
The following question follows the law of conservation of mass.
The law of conservation of mass states that in a reaction the mass of the products is equal to the mass of the reactants.
The reaction is :
Pb(NO₃)₂(aq) + K₂CrO₄(aq) → PbCrO₄(s) + 2KNO₃(aq)
the mass of beaker A containing lead nitrate = 128.71g
the mass of beaker B containing potassium chromate = 128.97g
After mixing beaker A and B,
mass of beaker A = 154.10g
mass of beaker B = 103.58g
Thus, according to law of conservation of mass,
mass of reactants = 128.71 + 128.97 = 257.68g
mass of products = 154.10 + 103.58 = 257.68g
hence, mass of products = mass of reactants.
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When drawing conclusions from the data in a scientific claim, you need to evaluate the person making the claim. the person making the claim should be?
When drawing conclusions from the data in a scientific claim , the person making the claim should be trained in that field in which he or she is making claim.
Claim made by scientists in there research or theory is known as Scientific claim. It is based generally on evidences and systematic observation . These claims should be supported by proofs and pre existing theories so that this can be relied on.
But every scientific claim is not true and thus is non reliable because of faults and flaws made during the experiment and investigation .
Therefore to make a claim reliable , the person making the claim should have abundance knowledge of it and have done sufficient background search of the topic on which he or she is making the claim. Also he or she should be trained in the field in which they are making the claim then only the claim can be trusted and the theories and conclusion can be made out of it.
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a scientist wants to identify an unknown compound on the basis of its physical properties. the substance is a white solid at room temperature. attempts to determine its boiling point were unsuccessful. using table 6, name the unknown compound
The substance is a white solid at room temperature is sodium chlorides
We have a table of physical properties of four different substances and unknown substance that we're trying to identify using that table. So we have four compounds 1. oxygen 2.water 3.sucrose and 4.sodium chloride. both oxygen and water are colorless, so can't be those two. Sucrose and sodium chloride both are solids.abou boiling point , sucrose does not have a boiling point. and sodium chloride does have a boiling point, so the unknown compound is sodium chloridesSodium Chloride is essential to maintain the electrolyte balance of fluids in a person's body. it is also known as salt table.
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Dilute 500 ml of 0.5 m kcl to a final volume of 3.5l. what is the resulting molarity?
Dilute 500 ml of 0.5 m kcl to a final volume of 3.5l resulting molarity is 0.1428
Molarity is the amount of a substance in a certain volume of solution. molarity is also defined as the moles of a solute per liters of a solution. molarity is calculated as M = no of moles of solute/volume of solution in liter
here, kcl is diluted as 0.5m and final volume is 3.5l so,
M = 0.5/3.5 = 0.1428
So molarity is 0.1428
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A chemist can determine the mass of K in a sample of known mass that consists of either pure K2O or pure K2O2. From this information, can the chemist answer the question of which compound is in the sample?
Yes , the chemist can answer if the compound in K2O or K2O2
The chemical formula and composition of both the compounds is entirely different. The compound K2O2 has an additional molecule of oxygen than K2O and hence will have have higher molecular mass.
In the compound K2O
molecular mass= 2x 39+16 =94
mass ratio of K in compound= 78/94 = 0.830
In the compound K2O2
molecular mass= 2x 39+16X2 =110
mass ratio of K in compound= 78/110 = 0.710
and hence by the required ratio while extracting K , the chemist may know if the compound is K20 or K2O2
If the ratio is anything different from 0.830 and 0.710 then the compund will be something different
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What type of polymer would you obtain if sorbitol was used as a plasticizer additive?
The type polymer would you obtain if sorbitol was used as a plasticizer additive is the Bio - polymer.
Plasticizers are the substances added to polymer soultion to enhances its flexibility and plasticity. This is the reason plasticizers make polymer solution suitable for the application of film coating.
Bio - polymers are produced from natural sources. Bio based polymer may produced from sugar- based or starch based.
Sorbitol is a naturally occuring sugar alcohol. it is the effective plasticizer for improving melt processing ability.sorbitol is a type of carbohydrate known as sugar alcohol or polyol. It is found in sugar free gum used as a plasticizers and reduce the hydrogen bonding of polymer and incorporate spaces into the polymer.
so, when sorbitol used as plasticizer additive the type of polymer formed is bio - polymer.
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The smallest particle and building block of all matter is called
HELP NEED ANSWER ASAP
Answer:
An atom is the smallest particle of an element and is the building block of all matter.
