What do blizzards consist of? (Select all that apply)

Question 1 options:

heavy snowfall


high winds


hail


extremely low temperatures

The weak base carbonate reacts with the water forming bicarbonate and the hydroxide ion.

The weak bases are given as the compounds that have the inability to get completely dissociated in water.

The carbonate is given as the weak base, as in water it remains constituted in the form of a bond with oxygen.

The reaction of water with the carbonate ion is given as:

[tex]\rm CO_3^{2-}\;+\;H_2O\;\rightleftharpoons HCO_3^-\;+\;OH^-[/tex]

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Answer:

c. contraction

Explanation:

Heating will cause substances to expand, or change their state (like solid to liquid) or it may be a chemical reaction.

Answer:

The 4th statement. Because sulfur is not malleable.

Answer:

d

Explanation:

Buffers are the solution that resists the change in pH. 1.39 ml of 5.90 M sodium hydroxide must be added to raise the pH to 5.75.

Henderson–Hasselbalch equation is used to determine the pH of the buffer by the equilibrium concentration of the acid and the conjugate base.

Moles of acetic acid are calculated as:

[tex]0.480 \times 0.0215 = 0.01032[/tex]

Moles of sodium acetate are calculated as:

[tex]0.480 \times 0.0275 = 0.0132[/tex]

The total number of moles is = 0.02352

Now, using the Henderson–Hasselbalch equation:

[tex]\rm pH = \rm pKa + log \dfrac{[Acetate]}{[Acetic\; acid]}[/tex]

Given,

pH = 5.75

pKa = 4.74

Substituting values in the above equation:

[tex]\begin{aligned} 5.75 &= 4.74 +\rm log \rm \dfrac{[Acetate]}{[Acetic\; acid]}\\\\10.2329 &= \rm \dfrac{[Acetate]}{[Acetic\; acid]}\end{aligned}[/tex]

Solving further:

[tex]\begin{aligned} 10.2329 &= 0.02352 - \rm \dfrac{[Acetic\; acid]}{[Acetic\; acid]}\\\\11.2329\; \rm [Acetic \; acid] &= 0.02352 \\\\&= 0.002093\end{aligned}[/tex]

Moles of acetate is calculated as:

0.02352 moles - 0.002093 moles = 0.021427 moles

Initial moles of acetate were 0.0132, added moles of acetate by the addition of the sodium hydroxide resulted in, 0.021427  - 0.0132 = 0.00822 moles of sodium hydroxide.

Volume is calculated as:

[tex]0.00822 \;\rm moles \times \dfrac{1\;\rm L}{5.90\;\rm M} = 0.00139 L[/tex]

Therefore, 1.39 mL of 5.90M of sodium hydroxide is added.

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Answer: Exosphere

Explanation:

Answer:

exosphere

Explanation:

the outermost layer of earth's atmosphere is called exosphere

Answer:The equilibrium constant (kc) for the reaction 2HCl(g) =H2(g)+Cl2 (g) is 4×10^-34 at 25°C.

Explanation:

In a nuclear fission reaction, a freely moving neutron is introduced to a nuclear fuel, then a neutron is absorbed by an atom's nucleus.

Nuclear fission is a process in which an unstable nuclei will convert into stable nuclei after releasing the energy in the form of particles.

When we introduce a freely moving neutron to the nuclear fuel of uranium-235 nuclei then this introduced neutron was absorbed by the nuclei and makes the nuclei more unstable. Then this unstable nuclei will convert into two nuclei in the addition of three neutrons.

Hence, a neutron is absorbed by an atom's nucleus.

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The coefficients of H2S and HNO3 in the balanced reaction equation are 2 and 3 respectively.

In a chemical reaction, reactans interact in a unique way to form products. In this case, the unbalanced reaction equation is; H2S + HNO3-----> NO + H2O.

Since this reaction is redox and electrons are lost/gained in the process, the coefficients of H2S and HNO3 in the balanced reaction equation are 2 and 3 respectively.

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Answer:

Explanation:

1st: 3

2nd: 2

The two liquids made a new substance.

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.

A chemical change occurs when some substances are transformed into different substances, with different nature and properties. In this case when both liquids are mixed a solid is formed.  This is an example of a change of state of the liquids reactants to the solid product, which has properties and characteristics different from that of the initial liquids of the mixture which is called a chemical change.

Hence, option D is correct.

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Entropy Change is the measure of the randomness of the thermodynamic system. The entropy change for the reaction is -49.3 J/K.

Entropy change is the ratio of the heat transfer of the system to the absolute temperature of the system.

The entropy of nickel = 182.1 J/mol. K

The entropy of oxygen = 205.0 J/mol. K

The entropy of nickel oxide = 37.99 J/mol. K

Entropy change is calculated as:

[tex]\begin{aligned}\Delta \rm S &= 2(37.99)-2(182.1)-205\\\\&= 75.98 - 364.2 - 205\\\\&= -493.22 \end{aligned}[/tex]

Therefore, -49.3 J/K is the entropy change.

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Answer:

40

Explanation:

because NaOH makes 40 grams.

1066.7 ml of the stock solution must start with, preparing 2.00 L of a 0.800 M NaNO3 solution.

Volume is the space occupied by a three-dimensional object.

By the formula [tex]\rm M_1V_1= M_2V_2[/tex]

M1 is the initial molarity, 1.5 M

M2 is the final molarity, 0.800 M

V1 is the initial volume

V2 is the final volume, 2.00 L

Putting the values in the equation

[tex]\rm 1.5\;M \times V_1= 0.800\;M \times 2.00\;L\\\\V_1 = \dfrac{ 0.800\;M \times 2.00\;L}{1.5\;M} = 1066.7\;ml[/tex]

Thus, the initial volume is 1066.7 ml

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Answer:

liquid

Explanation:

A solid is defined as substance with a set volume and form. A liquid is defined as substance with a set volume but no fixed form. A gas is substance that does not have a definite volume or shape. Plasma, like a gas, has no set volume or shape.

The speed of the wave increases as the frequency of the wave is increased from 0.1 Hz to 1.0 Hz.

The speed of a wave of a given wavelength is directly proportional to its frequency.

An increase in the frequency of a wave results in a proportional increase in the speed of the wave of the wavelength remains the same.

In the animation, as the frequency of the wave is increased from 0.1 Hz to 1.0 Hz, the speed of the wave is observed to increase as the time taken for the crests and troughs to move across the screen becomes smaller.

Therefore, the speed of the wave increases as the frequency of the wave is increased from 0.1 Hz to 1.0 Hz.

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Answer:

The balloon will expand

Explanation:

Steam needs more space than the equivalent wt amount of liquid

Answer:

10 atm

Explanation:

There's a lot to do here, but lets take it one step at a time. First, let's write a balanced equation for the decomposition of potassium chlorate into potassium chloride and oxgyen gas.

2 KClO3 → 2 KCl + 3 O2

Now let's find the moles of the KClO3 (molar mass 122.55 g/mol) that we have take 10 g/122.55 g/mol, grams will cancel and we are left with 0.0816 moles. lets divide that by two since we have a two in front of the KClO3 in the equation, and then multiply that number by 5 since it's the total moles of products, in summary, multiply by 5/2 to get 0.204 moles.

Now that we know the moles of our products, let's plug some stuff into the ideal gas law PV = nRT. We are looking for P so let's solve for that. P = (nRT)/V, now let's plug in our values. Make sure V is converted to liters so 0.5 L. And convert celcius to kelvin by adding 273

P = ((0.204 moles)(318 K)(0.08206 L atm mol^-1 K^-1))/0.5 L

A lot of units cancel, and we get about 10.65 atm, if you don't want the answer in atm, you can find a conversion equation. But let's round to sig figs for now, which will bring us to 10 atm.

696.32 mmHg is the final pressure of the gas.

The ideal gas equation, pV = nRT, is an equation used to calculate either the pressure, volume, temperature or number of moles of a gas.

Given data:

[tex]P_1[/tex] = 720 mmHg              

[tex]P_2[/tex] = ?

[tex]n_1[/tex] = 2.5 mol                

[tex]n_2[/tex] = 3.2 mol

[tex]V_1[/tex] = 34 L            

[tex]V_2[/tex] = 45 L

Formula

Combined gas law

[tex]\frac{P_1 V_1}{n_1} = \frac{P_2 V_2}{n_2}[/tex]

[tex]P_2[/tex] = 696.32 mmHg

Hence, 696.32 mmHg is the final pressure of the gas.

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Answer:

More radiation entering the earth's atmosphere.

Explanation:

The ozone layer is layer of O₃ (oxygen) and prevents most radiation from reaching earth.

Answer: Acceleration and velocity

Explanation:

Newton's second law says that when a constant force acts on a massive body, it causes it to accelerate, i.e., to change its velocity, at a constant rate. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force.

Answer:

Moving with changing velocity

Explanation:

the resultant force acting on it is not zero

hence

Answer:

See below

Explanation:

(NH4)2SO4   Molar weight (from periodic table)

       (N =14    H4 = 4   ) * 2 = 36

           S = 32   O4 = 64                  TOTAL = 132 gm/mole

N % =  ( 2*14) / 132 = 21.2%       molar mass = 28 gm

H % = (2 *4) / 132 =  6%            molar mass = 8  gm

S % =  32/132 = 24.2 %             molar mass = 32 gm

O % = (64) / 132 = 48.5%           molar mass = 64  gm

Answer:

Iron - Nails, Utencils, Appliances

Copper - Wiring

Aluminiem - Roofing, Ducting

Hydrogen atom is added denotes to something

So the

Hence.

Bromothymol blue will turn yellow

Answer:

10.4 moles

Explanation:

    n / 5.2   =   2  M

     n = 10.4  moles

6.99 grams of iron (Fe) would produce 10 g of rust (Fe2O3) when iron combines with oxygen to form rust.

The mass of a substance can be calculated as follows:

According to this question, iron combines with oxygen to form rust as follows:

4Fe + 3O2 → 2Fe2O3

First, we convert the mass of rust to moles as follows:

moles of Fe2O3 = 10g/159.69 = 0.063moles

Next, convert moles of Fe to mass as follows:

mass of Fe = 0.125 × 55.85 = 6.99g

Therefore, 6.99 grams of iron (Fe) would produce 10 g of rust (Fe2O3) when iron combines with oxygen to form rust.

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Methane (CH4) with the smallest atomic size, would have the lowest boiling point.

It is the temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature.

CH₄, SiH₄, GeH₄, SnH₄ are very similar. They are all in the same group and their molecular geometry is a tetrahedral.

They have covalent bonds. The key difference: The number of protons and electrons.

These are non-polar molecules, so there are no ionic bonds. There are no H bonded to a F, N or O, so there is no hydrogen bonds.

Dipole induced dipole forces (AKA London dispersion forces) dictate the boiling points of these atoms. It is the attraction between atoms that dictate how easily they can disperse.

The electrons in an atom are constantly moving due to their repulsion of each other. However, if one electron has moved and the other has not, it is temporarily charged.

The biggest molecule will have the highest boiling point. The more protons and electrons, the stronger the effect.

Therefore, Methane (CH4) with the smallest atomic size, would have the lowest boiling point.

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Answer:

Convection

Explanation:

Convection is steam and the condensation of vapor.

1.648 moles of ammonia will be required to produce 0.824 moles of nitrogen gas.

Mole is a very important unit of measurement that chemists use. A mole of something means you have 602,214,076,000,000,000,000,000 of that thing, like how having a dozen eggs means you have twelve eggs.

According to the reaction, 1 mole of nitrogen gas is produced by 2 moles of ammonia.

Then, 0.824 moles of nitrogen gas will be produced by:

1.648 moles of ammonia will be required to produce 0.824 moles of nitrogen gas.

Hence, 1.648 moles of ammonia will be required to produce 0.824 moles of nitrogen gas.

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Answer:

a. energy changes during heating.

b. energy changes during chemical reactions.

c. color changes during chemical reactions.

d. Both (a) and (b)

Explanation:

The answer is D.Both (a) and (b)