Consider a three-dimensional model of methane as seen here in two dimensions. If we use VSEPR theory to describe the geometry of a methane molecule we say its shape is. A) Linear. B) Tetrahedral. C)Trigonal Planar. D)Trigonal Bipyramidal

Answer: the slope of the calibration curve is - 0.0295

Explanation:

as things are not under standard conditions that is;  1M of each reactants at T = 25°C and P = 1 atm; therefore we will use the Nernst Equation.

E = a × pNi + b

a is the slope

pNi = -log [Ni²⁺] = log 1/[Ni²⁺]

therefore the Half reaction;

Ni²⁺ (aq) + 2e⁻ = Ni (s)

here; E = E₀ + RT/zF ln[Ni²⁺]

we know that;

gas constant R = (8.31 J/mol-K)

absolute temperature T =25°C =  298 K

number of moles of electrons transferred by the cell's reaction z  = 2

F is Faraday constant, = 9.64853399(24)×10⁴ C mol−1

E₀ = b

RT/zF ln[Ni²⁺] = alog 1/[Ni²⁺]

Logx = Ln x / Ln 10 = Ln (x/2.3)

so

a = (RT/zF ln[Ni²⁺])/log 1/[Ni²⁺]

= (RT/zF ln[Ni²⁺]) / ((ln 1/[Ni²⁺]) / 2.3)  

= (2.3RT/zF ln[Ni²⁺]) / (ln 1/[Ni²⁺])

= (2.3RT/zF ln[Ni²⁺]) / (-ln [Ni²⁺])

= -2.3RT/zF

so we substitute

= (-2.3 × 8.31 ×298 ) / (2 × 9.64853399(24) × 10⁴)

= - 0.0295

therefore the slope of the calibration curve is - 0.0295

Answer:

a = 1, b = 11, c = 7, d = 8

Explanation:

aC7H16 + bO2 ------> cCO2 + dH2O

1 C7H16 + 11 O2 ------> 7 CO2 + 8H2O

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Answer:

Ionic solids

Explanation: Ionic solids—Made up of positive and negative ions and held together by electrostatic attractions. They're characterized by very high melting points and brittleness and are poor conductors in the solid state. An example of an ionic solid is table salt, NaCl.

Answer:

Ionic solids

Explanation:

Answer:

80.2L

Explanation:

Given parameters:

Initial volume of oxygen = 47.2L

Initial pressure of oxygen = 1240torr

Final pressure  = 730torr

Unknown:

Final volume  = ?

Solution:

To solve this problem, we apply the Boyle's law proposed by Robert Boyle. It states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".

Mathematically;

             P₁V₁ = P₂V₂

P and V are pressure and volume

1 and 2 are initial and final states

              1240 x 47.2  = 730 x V₂  

                  V₂  = 80.2L

Answer:

Bonding Order = number of bonding electrons – number of antibonding electrons/2.

So for CO2, there is a total of 16 electrons, 8 of which are antibonding electrons.

So 16 – 8 = 8; divided by 2 = 4. So, 4 is the bonding order of CO2. The molecular structure of CO2 looks like this:

..~-~~..

O=C=O

..~-~~..

Answer:

0.0956 M

Explanation:

Step 1: Calculate the moles corresponding to 6.25 g of barium nitrate (solute)

The molar mass of barium nitrate is 261.34 g/mol.

6.25 g × 1 mol/261.34 g = 0.0239 mol

Step 2: Convert the volume of solution to liters

We will use the conversion factor 1 L = 1000 mL.

250 mL × 1 L/1000 mL = 0.250 L

Step 3: Calculate the molarity of the solution

The molarity is equal to the moles of solute divided by the liters of solution.

M = 0.0239 mol / 0.250 L = 0.0956 M

Answer:

Boron is Nonmetal

Explanation:

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The total mass of the products is 40 grams (Option C).

In 1789, Antoine Lavoisier discovered that mass is neither created nor destroyed in chemical reactions. This is now known as Lavoisier's law of conservation of mass. In other terms, the sum of the masses of the reactants is equal to the sum of the masses of the products. So, in this case, the total mass of the products must be 40 grams as well.

The total mass of the products is 40 grams.

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Answer:

Yes

Explanation:

yes, this is in every chemical reaction (except nuclear reaction) and Is known as "law of conservation of mass"

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Answer:

your answer would be false.

Explanation:

prevailing winds blow east-west rather than north-south.

Answer:

b option is the answer.

Answer:

-2

__________________________________________________________

How many electrons does Oxygen need:

We know that oxygen has an electric configuration of:

2 , 6     [8 electrons]

From the octet rule, we know that all elements try to get to the electronic configuration of the nearest noble gas

In the case of Oxygen, the nearest noble gas is Neon with the electronic configuration:

2 , 8     [10 electrons]

From the above, we can see that oxygen needs 2 more electrons in order to attain the nearest noble gas configuration

What will be the Charge on the ion?:

We know that electrons are negatively charged

Once oxygen gains 2 electrons to attain noble gas configuration, it will have 2 more electrons than it should have

So, the charge on the ion will be -2 since there are 2 extra electrons and both of the electrons contribute a negative charge

Hence, the charge is -2

Answer:

neutral/no charge

Explanation:

Answer: The cathode is the electrode where reduction (gain of electrons) takes place (metal-B electrode)

Answer: The electrode where reduction occurs.

Answer:

Answer is the number of the c

Answer:

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.

Explanation:

More than one pair of electrons can be shared between atoms to form double or triple covalent bonds. Unlike ionic bonds, covalent bonds are often formed between atoms where one of the atoms cannot easily attain a noble gas electron shell configuration through the loss or gain of one or two electrons.

Answer:

def CO2

Explanation:

Answer:

147.6 mL .

Explanation:

sodium carbonate , Na₂CO₃

Molecular weight = 106

3.55 gm of sodium carbonate = 3.55 / 106

= .0335 moles

Let the volume of litre required = V

V litre of .227 M solution will contain

V x .227 moles of sodium carbonate . So

V x .227 = .0335

V = .1476 L

= 147.6 mL .

Answer:

Hail pallets forms inside of cumulonimbus clouds

Explanation:

Answer: cumulonimbus hope it helps pls stay safe

Answer:2

Explanation:

He

Answer:

Explanation:

white ring of NH₄X is formed . Here X is Cl and

NH₄X is NH₄Cl ( ammonium chloride )

The reaction is as follows

NH₃ + HCl = NH₄Cl ( white fume )

The acid that reacts with ammonia has been Hydrochloric acid (HCl), and the element X in the acid has been Chlorine (Cl).

The ammonia has been the gas with the pungent smell. It has been the compound with the dihybrid element used for the production of various nitrogen compounds.

The reaction of Ammonia with acid results in the formation of ammonium ions. The ions on reacting with the basic part of the acid, form the salt and give the product.

The white ring with the reaction of ammonia has been formed of the ammonium chloride. Thus the acid that reacts with ammonia has been Hydrochloric acid (HCl), and the element X in the acid has been Chlorine (Cl).

For more information about ammonia, refer to the link:

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Answer:

0.186M

Explanation:

First, we need to obtain the moles of nitric acid that are given for each solution. Then, we need to divide these moles in total volume (120mL + 20mL = 140mL = 0.140L) to obtain molarity:

Moles Nitric acid:

0.0200L * (0.100mol / L) = 0.00200 moles

0.120L * (0.200mol / L)= 0.02400 moles

Total moles: 0.02400moles + 0.00200moles = 0.026 moles of nitric acid

Molarity: 0.026 moles / 0.140L

Answer:

Mass percent of silicon = 46.75% (Approx)

Explanation:

Given:

Mass of silicon = 0.389 g

Mass of silicon dioxide = 0.832 g

Find:

Mass percent of silicon

Computation:

Mass percent of silicon = Mass of silicon / Mass of silicon dioxide

Mass percent of silicon = [0.389 g / 0.832 g]100

Mass percent of silicon = 46.75% (Approx)

Answer:

simple sugar

Explanation:

The northern cardinal is a bird of the Cardinalis genus. It s also called as the red bird. It is mostly found in Canada, United states and parts of Texas and Mexico. The Cardinal birds do not migrate in winter and spends the winter season in New York. These birds are fed with sunflower seeds by the people during the winter season. The starches in the seeds of the sunflower helps these birds to survive in the winter. The glucose or the simple sugar found in the starches are the building blocks of the starches.

Answer:

How hot or cold the substance is

Explanation:

You can do a lot with just the temperature of a substance. Chemists can use this to identify the substance because of the temperature at which it melts. They can then find out how long it took to melt, which can also help.

Answer:c how hot or cold

Explanation:

Answer:

Explanation:

Sn (Z = 50 )

Electronic configuration = [Kr] 4d¹⁰5s²5p²

= 1s²2s²p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p²

So , total number of electrons in d orbital = 10 + 10 = 20 .

Answer:

as the charge of the ions increases, the lattice energy increases. as the size of the ions increases, the lattice energy decreases.

For a given arrangement of ions, the lattice energy increases as ionic radius decreases and as ionic charge increases.

An atom or molecule is said to be an ion if one or more of whose valence electrons have been acquired or lost, providing it a net negative or positive electrical charge.

Faraday knew that metals disintegrated together into solution place at a single electrode and that a second metal was placed first from solution at the opposite electrode, as such matter had to be trying to move underneath the impact of an electrical current even though he was unable to identify the particles trying to move between the electrodes.  For a given arrangement of ions, the lattice energy increases as ionic radius decreases and as ionic charge increases.

Therefore, for a given arrangement of ions, the lattice energy increases as ionic radius decreases and as ionic charge increases.

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Answer: 3

Explanation:

It speed up the molecules to get them to bent and move instead of staying solid

Answer:

c

Explanation:

When enough heat energy is transferred to a metal, the molecules vibrate quickly enough so that the solid metal starts to change shape.

22.7 liters

The molar volume of an ideal gas depends on the temperature and pressure. One mole of any ideal gas occupies 22.7 liters at 0 0C and 1 bar (STP).

Hope this helped

11.02g

Explanation:

mole ratio between H2SO4 and water is 1:2

mole of H2SO4 is 0.306

then the mole of water is 0.612

finally the mole of water is multiplied by 18, the molar mass to get 11.02 g of water