The formulas for ethane, ethene, and ethyne are c2h6 , c2h4 , and c2h2 , respectively. Rank these compounds by the length of the carbonâ€"carbon bond.

The number of atoms per cubic meter in aluminum is 6.04 x 10²².

"Density is the mass per unit volume. Density is a scalar quantity. It is denoted by d and the symbol for density is given as rho, a Greek symbol. Density is calculated as mass divided by volume."

The density of Al is 2.71 g/cm3

The atomic weight of Aluminum is 26.98 g/mol.

The Avogadro's number is 6.023 x 10²³

To find the number of atoms per cubic meter

N = ρNa / A

N = 2.71 x 6.023 x 10²³  / 26.98 = 6.04 x 10²²

Thus, the number of atoms per cubic meter in aluminum is 6.04 x 10²².

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The formula for glucose is C₆H₁₂O₆. by multiplying the molecular no of 1 glucose molecule by 3 we get 18 carbon and 36 hydrogen and 18 oxygen molecule. i.e. C₁₈H₃₆O₁₈

Elaborate:

It features a molecular formula of C ₆ H ₁₂ O ₆ When HI is heated for a long time, n-hexane is formed which indicates that all the six carbon atoms are linked in a straight chain.

The oxime is formed when glucose reacts with hydroxylamine and cyanohydrins with the addition of hydrogen cyanide to it.

What is a molecular formula?

The formula is the formula showing the actual number of each atom in a molecule.

How may be a molecular formula written?

A formula uses chemical symbols and subscripts to indicate the exact numbers of different atoms in a molecule or compound. An formula gives the simplest, whole-number ratio of atoms during a compound. A molecular formula indicates the bonding arrangement of the atoms in the molecule.

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The chemical formulas and groups of the given minerals are as follow:

Quartz : Sio2 (Silicate)

Calcite : CaCO3 (Carbonate)

Pyrite : FeS2 (Sulfide)

Gold : Au (Native Elements)

Copper : Cu (Native Elements)

A piece of quartz can scratch a sample of calcite, however calcite can't scratch quartz. If you have a sample if each, attempt to scratch one sample with the other to look at the distinction in the hardness. You also can take a look at the hardness of these two minerals using a pocketknife.

Quartz is the second most abundant mineral in Earth's crust after feldspar. It occurs in nearly all acid igneous, metamorphic, and sedimentary rocks. It is an essential mineral in such silica-rich felsic rocks as granites, granodiorites, and rhyolites.

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No, the jewelry, could not be made of pure silver.

The characteristics of pure silver include being almost white, shiny, soft, ductile, malleable, and a superb conductor of both heat and electricity. Although it is not a chemically active metal, heated concentrated sulfuric acid and nitric acid both attack it and cause nitrate to form. Silver is one of the so-called precious metals, along with gold and the metals from the platinum group. Silver has been used for many years to make coins, ornaments, and jewelry due to its relative rarity, dazzling white color, malleability, ductility, and resistance to air oxidation. Silver is also a soft, malleable, highly ductile, and shiny metal. Despite having the highest electrical conductivity of any metal, its exorbitant cost prevents it from being widely used for electrical purposes. Silver is not a metal that reacts chemically.

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Answer:

when molecules loose or gain electro it get charge and when it get attached with other charge molecules the form bond

ans is loose or gain ,bond

Electrons ruminate around the nucleus in particular circular path known as orbit called shell.

Electronic configuration is the dispense of electrons.

Electronic configuration is also known as electronic structure.

Also termed as spatial methodize.

More than one orbital in the electron shell is known as subshell, they have similar energy level.

In Electronic configuration there are four shell present namely k,l,m,n and there are 4 sub-shell namely s,p,d,f.

As we know that every subshell fills gradually s max 2 electrons p - 6 , d - 10 and f - 14.

So,

According to questions,

Thge element has configuration 1s2 2s2 2p4 hence 8 electrons.

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a. fepo3 - Iron phosphite - Ionic

b.cl2o7 - Chloline heptoxide - Molecule

c.br2 - Bromine - Molecule

d.ca3(po4)2 - Calcium phosphate - Ionic

e.pcl3 - Phosphorus trichloride - Molecule

f.al(clo2)3- Aluminum Chlorite - Ionic

The term "ion" refers to an atom or molecule with a net electrical charge. The charge of an electron is typically regarded to be negative; it is equivalent to and opposes the charge of a proton, which is typically thought to be positive.

An atom or collection of atoms with an electric charge is known as an ion. Cations are the name for positive-charged ions. Anions are the name for ions that have a negative charge. The body contains several common chemicals as ions. Sodium, potassium, calcium, chloride, and bicarbonate are typical examples.

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a. fepo₃ - Iron phosphite - Ionic

b.cl₂o₇ - Chloline heptoxide - Molecule

c .br₂ - Bromine - Molecule

d.ca₃(po₄)₂ - phosphate - Ionic

e .pcl₃ - Phosphorus trichloride - Molecule

f. al(clo₂)₃- Aluminum Chlorite - Ionic

What are ions?

The term "ion" refers to an atom or molecule with a net electrical charge. The charge of an electron is usually regarded to be negative; it is equivalent to and opposes the charge of a proton, which is usually thought to be positive.

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The number of sodium, potassium and ATP would be: 700 Na+ ions, 200 K+ ions and 900 ATP molecule.

The net charge differential would be -200.  

Potassium is important for keeping the body hydrated and with sodium support cellular function (sodium-potassium ( Na⁺/K⁺) pump).

The sodium-potassium pump releases three Na+ ions, while in the same time two K+ ions exit the cell. For this process one molecule of ATP is consumed.

Inside the cell, there are 1000 sodium ions, 1000 molecules of ATP.

While outside the cell, there are 1000 potassium ions.

After 100 cycles, 300 sodium ions will exit the cell and 200 potassium ions will enter the cell, using 100 ATP molecules.

1000 - 300 = 700; number of sodium ions (Na+) left in the cell

1000 - 100 = 900; ATP molecules left in the cell

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Eight atoms of carbon react with 18 atoms of hydrogen , forming only one molecule of [tex]C_{8} H_{18[/tex] is considered as violation of the law of conservation of mass .

According to the law of mass conservation , neither chemical processes nor physical changes can create or destroy mass in an isolated system . The mass of the products and reactants of a chemical reaction must be equal, in accordance with the law of conservation of mass .

The reaction occur when eight atoms of carbon react with 18 atoms of hydrogen , forming only one molecule of [tex]C_{8} H_{18[/tex] is given as .

8C +18[tex]H_{2}[/tex] → [tex]C_{8} H_{18[/tex]

Mass of reactants = 8 × 12 + 18 × 2 = 132 g

Mass of reactants = 8 × 12 + 18  = 114 g

So , mass of reactant is not equal to the mass of product .

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A new element was discovered on the planet zeb ii. The name of the element zebnium, and the symbol of the element, is zb. The formula for the zebnite ion is ZbO³⁻₃.

Chemical elements are a substance that is present in the free form or mixed form in the earth's crust. They are represented in the periodic table.

The ion is the charged form of the element. So it will contain a negative or positive sign in with the charge in the compound.

Thus, if the formula for the zebnate ion is zbo43-, The formula for the zebnite ion is ZbO³⁻₃.

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The mass number of the atom is 21, the atomic number is 9, and the element is Fluorine. There are 9 protons, 9 electrons, 12 neutrons, and the elemental symbol is F.

For every atom:

In the diagram:

Number of electrons = 9

Number of protons = 9

Number of neutrons = 12

Mass number = 12 + 9

                      = 21

Atomic number = number of protons

                         = 9

Element with atomic number 9 = Fluorine

Symbol of the element = F

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Answer:

0.10

Explanation:

Molar mass of F2 gas = 38 g/mol.

Moles of F2 gas = 3.8/38 g/mol

=0.1

Rounded to 2 significant digits is 0.10.

0.10 moles F2 has been produced.

If two atoms are joined by a polar covalent bond, the shared electrons will tend to stay closer to the atom with the higher electronegativity

An atom's ability to attract the electrons of a bond is known as its electronegativity, and it rises as this propensity does. A covalent bond is formed when two coupled atoms with the same electronegativity values are in close proximity to one another.

In a chemical bond, the more electronegative atom often attracts the electrons more than the other atom. A polar covalent bond is the result of this. The electrons are not at all shared if the electronegativity values are drastically different. To create an ionic bond, one atom effectively accepts the bond electrons from the other atom.

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If placed into a water-filled overflow, it would displace 18.84 ml.

Overflowing means to flood something to the point where the liquid spills out the edges. Rivers occasionally exceed their banks after intense downpours, flooding the surrounding area.

Density is the measurement of how tightly a substance is packed. It has such definition since it is the mass per unit volume.

Symbol for density: D

Formula for Density: Where is the density, m is the object's mass, and V is its volume, the equation is: = m/V

based on the specified value;

density=65g/ml

mass=1225g

as we know that

D=m/v

so, v=m/d

v=1225/65

 =18.84ml

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The pH of 1.0 l of an aqueous solution containing 75 mmol is 5.61

Here we calculate pH value

Given data is aqueous solution containing 75 mmol (pka = 6.09) and 25 mmol of its conjugate base

pH = pKa + log [A-]/[HA]

pH = 6.09 + log (25 mM/75 mM) = 6.09 - 0.48 =5.61

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Mass of water =  15.287 grams.

The equation here will look like this:

CxHy + O2 ------->CO2 + H2O

Hydrocarbon (contains c' and 'H' alone) and O2 are the reactants in this reaction.

Water and carbon dioxide are products.

Since mass cannot be created or destroyed in an isolated system, we now know this to be true. Although it is conserved, it can change forms.

Therefore, for chemical reaction

The mass of the reactants and the mass of the products must match. Here, just forms are altered to create the product.

Consequently, according to the Mass Law of Conversion:

Mass of Reactants = Mass of Products, we might say.

[(Mass of CO2) + (Mass H2O ] = [(Mass of Hydrocarbon) + (Mass of 02)]

[10.286  + 38.265] = [33.264 g + Mass of H20]

48.551  = 33.264 + Mass of H2O.

Mass of water equals 48.5519-33.261

The Mass of water will therefore be 15.287 grams.

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Answer: 17.5 cm

Explanation:

10 mm=1 cm

175mm * 1 cm/10 mm=

175/10 cm=17.5 cm

The correct answer is Events that happen over and over form a pattern.

Therefore the correct answer is B. Events that happen over and over form a pattern.

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The factors might include:

What is Error in measurement?

Error in Measurement can be defined as difference in value between the actual value and the measured value.

There are some factors that might have contribute to the inaccuracy in the measurement of the metal block and they include :

The students may have have used a faulty instrument or an inaccurate instrument. The accuracy of the measurement will depend on the kind of scale they used. A kitchen scale, for example, is probably less accurate than a calibrated scale in a chemistry lab.

Random errors occurs when there might have been an error due to inability to read the accurate value of the instrument.

Density varies with temperature and their might have been slight changes in temperature leading to inaccuracy in the readings.

In conclusion, errors can be mitigated by taking into account when we make a measurement by reporting an uncertainty value.

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A singlet, a triplet, and a quartet multiplicities are observed for the signals in the off-resonance decoupled 13c NMR spectrum of (2e)-3-chloroacrylaldehyde

A spectrum is defined as the characteristic wavelengths of electromagnetic radiation (or parts thereof) emitted or absorbed by an object or substance, atoms or molecules. Multiple: Spectrum. A spectral line is an otherwise smooth and continuous spectral dark or bright line resulting from the emission or absorption of light in a narrow frequency range compared to adjacent frequencies.

These applications include Voice of America broadcasting, weather services, radar and voice communication systems for controlling commercial and civil air and sea traffic, weather satellite systems, flood warning and water control systems, and time signals.

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The phase diagram makes it possible to predict the stability of any of the phases of water based on the diagram..

Water is able to exist in three phases; solid, liquid and gas. The reason behind the phases of water is the fact that there are different degrees of intermolecular interactions that exists in the various phases of water.

Thus, on the phase diagram, of is easy to trace the the regions of temperature and pressure that corresponds to the solid, gaseous and liquid states of a given substance that could be used to make deduction about the substance.

The phase diagram shows the interaction between the various phases of water on the same diagram. This makes it possible to predict the stability of any of the phases of water based on the diagram.

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Phosgene was used during the World War I as a poisonous gas. It can be prepared by the action of sunlight on a mixture of carbon monoxide and chlorine gases. Phosgene has the following elemental composition by weight: 12.14% C, 16.17% O and 71.69% chlorine. Its molecular weight is 98.9 g mol-1.

Phosgene is a foremost industrial chemical used to make plastics and pesticides. At room temperature (70°F), phosgene is a toxic gas. With cooling and pressure, phosgene fuel can be converted into a liquid so that it can be shipped and stored.

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Use only sterile water, as was previously indicated. Water is made bacteriostatic by adding benzyl alcohol. You can immediately decide which is suitable based on allergies.

If you are allergic to benzyl alcohol, avoid using or drinking bacteriostatic water altogether and opt for sterile water.

Another distinction is with indications. The FDA regulates the purposes for which drugs are used or what is disclosed on their labels. While sterile water is designated for both irrigation and injection, bacteriostatic water is only intended for injections.

The difference of several uses, as has previously been established, is crucial. Due to the absence of a bacteriostat, sterile water can only be utilized once.

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I'm sure but a or c I'm sure

Explanation:

a color change occurs cause when it Colides it mixes in with the other color and changes it completely

The correct answer is option C . Clue that a chemical reaction has taken place is not that the reactant is smaller.

Let's break down each of the options to understand why option c is incorrect:

a. A color change occurs: When a chemical reaction occurs, there may be a change in color. For example, when iron rusts, it changes from a metallic silver color to a reddish-brown color.

b. A flame occurs: Some chemical reactions produce heat, and if the reaction is exothermic enough, it can produce a flame. For instance, when wood burns, a flame is produced as a result of a chemical reaction between the wood and oxygen.

c. The reactant is smaller: This statement is incorrect. A chemical reaction does not necessarily mean that the reactant becomes smaller. Reactants can combine to form a larger product or they can rearrange to form different molecules without changing their size.

d. Bubbles form: When a gas is produced during a chemical reaction, bubbles may form. For example, when vinegar (acetic acid) reacts with baking soda (sodium bicarbonate), carbon dioxide gas is released, causing bubbles to form.

e. A solid forms: Some chemical reactions involve the formation of a solid. For instance, when a metal reacts with a non-metal, such as sodium reacting with chlorine to form sodium chloride, a solid salt is formed.

Thus, clues that a chemical reaction has taken place include a color change (option a), a flame (option b), bubbles forming (option d), and a solid forming (option e). The incorrect option is c, which states that the reactant becomes smaller.

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The features are shared by all three-carbon monosaccharides, They are all pentoses. In their linear forms, they all contain carbon carboxyl and several hydroxyl functional groups. In their linear forms, they all contain a carbonyl and several hydroxyl functional groups.

Carbon is used in some form in almost every industry in the world. It is used as fuel in the form of coal, methane gas, and crude oil (used to make gasoline). It is used to make all sorts of materials, including plastics and alloys such as steel (a combination of carbon and iron).

Life on Earth cannot exist without carbon. This allows carbon to readily form bonds with other atoms, giving it flexibility in the forms and functions that biomolecules such as DNA and RNA can adopt, and is essential for growth and replication, the defining properties of life. This is partly due to

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Correct answer is Each orbit has a specific energy level.

Therefore, Correct statement is Each orbit has a specific energy level.

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The complete question is mentioned below:

Which statement about Niels Bohr’s atomic model is true?

a) Higher orbits have lower energies.

b) Each orbit has a specific energy level. c) Electrons can exist in any energy level. d) Orbits close to the nucleus have no energy.

H2po4-1 has a pka of 6.86. if the concentration of h2po4-1 is 0.622 mm and the concentration of h1po4-2 is 0.038 mm the ph value in the solution is 8.3

pH stand for potential hydrogen the pH of a solution also can be determined by finding the pOH. determine the concentration of the hydroxide ions by dividing the molecules of hydroxide by the volume of the solution and here to find pH value in the solution here the formula is

pH=pka log acid/base

ph=pka log  h2po4-1/h1po4-2

ph=6.86×log0.622/ 0.038

ph=6.86×log16.36

ph=6.86×1.21

ph=8.3

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Mixed molarity is 0.254 M

The volumes are additive is 1.22 M

Part A

mixed molarity = (M1 V1 + M2V2  )/  V1+V2

                     = (0.150 x 42  + 0.370 x 37.6 ) / (42+37.6)

                       = 0.254 M

NaOH = 0.254M

[Na+ ]= 0.254M

[OH-]= 0.254M

Part B

[Na+]  =  2 x 44 x 0.1 / 44 + 25

           = 0.1275 M

{SO4-2]  = 44 x 0.1 / 44 + 25  = 0.063 M

[K+]  =25 x 0.17 / 44 + 25 =  0.062 M

[Cl-]  = 25 x 0.17 / 44 + 25 = 0.062 M

Part C

KCl moles = 3.70 / 74.55 = 0.0493

KCl molarity = 0.0493 / 0.075  = 0.66M

[K+] = 0.66 M

[Ca+2]  = 0.280 M

[Cl-] = 0.66 + 2 x 0.280 = 1.22 M

Volume is a measurement of three-dimensional space that is occupied. Numerous imperial units or SI-derived units, such as the cubic meter and liter, are frequently used to quantify it numerically (such as the gallon, quart, and cubic inch). Volume and length (cubed) have a symbiotic relationship. The volume of a container is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the amount of fluid (liquid or gas) that the container may hold.

Volume was initially measured using naturally occurring vessels of a comparable shape and then with standardized containers. Arithmetic formulas can be used to quickly calculate the volume of several straightforward three-dimensional shapes.

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If Benjamin Franklin had decided to call the charge on the amber rod positive, nothing would have changed only that we would have a different convention for identifying charges.

We know that electricity has to do with the flow of  current, there are fundamentally two kinds of charge, a positive and a negative charge. We know that the kind of charge that a material carries is arbitrary.

As we can see here, it was Benjamin Franklin in 1750 that defined the charge on the glass rod and the charge on the amber rod as negative. If Benjamin Franklin had decided to call the charge on the amber rod positive, nothing would have changed only that we would have a different convention for identifying charges.

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