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Rashid [163]
3 years ago
9

When matter changes from a solid to a liquid, the process is called __________

Chemistry
1 answer:
Anna [14]3 years ago
6 0

Answer: melting

Explanation:

The process in which a solid changes to a liquid is called melting. The melting point is the temperature at which a solid changes to a liquid. For a given type of matter, the melting point is the same as the freezing point.

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Consider the equation below.
sergejj [24]

Answer is: Keq = [CO₂].

Balanced chemical reaction: CaCO3(s) ⇄ CaO(s) + CO₂(g).

The equilibrium constant (Keq) is a ratio of the concentration of the products  to the concentration of the reactants.

Pure liquids (shown in chemical reactions by appending (l) to the chemical formula) and solids (shown in chemical equations by appending (s) to the chemical formula) not go in to he equilibrium constant expression, only gas state (shown in chemical reactions by appending (g) to the chemical formula) reactants and products go in to  the equilibrium constant expression.

5 0
4 years ago
Read 2 more answers
If the concentration of the product NH3 was increased from 1.0 x 10-4 M to 5.6 x 10-3 M, calculate the reaction quotient (Q) and
loris [4]

The chemical system will shift to the left in order to produce more N₂ , H₂.

The missing data in the question is

The equilibrium constant (K) of the reaction below is K = 6.0 x 10⁻² with initial concentrations as follows: H₂ = 1.0 x 10⁻² M, N₂ = 4.0 M, and NH₃ = 1.0 x 10⁻⁴M.

<h3>What is Chemical Equilibrium?</h3>

When the rate of forward reaction is equal to the rate of the backward reaction then the equation is said to be in Chemical Equilibrium.

N₂ + 3H₂ --> 2NH₃

The reaction quotient, Q, has the same algebraic expressions but uses the actual concentrations of reactants.

[N₂] = 4.0M; [NH₃] = 1.0x10⁻⁴M and [H₂] = 1.0x10⁻²M

Thus, for the reaction:

N₂ + 3H₂ ⇄ 2NH₃

The equilibrium constant, K, of this reaction, is defined as:

\rm K = \dfrac{[NH_3]^2}{[H_2]^3 [N_2]}

\rm Q = \dfrac{[NH_3]^2}{[H_2]^3 [N_2]}

Q = (5.6 x 10⁻³ )² / (1.0 x 10⁻²) ³(4.0 )

Q = 7.84

As Q > K,

The chemical system will shift to the left in order to produce more N₂ , H₂

To know more about chemical equilibrium

brainly.com/question/4289021

#SPJ1

3 0
2 years ago
Ethylenediamine (en) forms an octahedral complex with Ni2+(aq) with the formula [Ni(en)3]2+. Ni2+(aq) + 3 en ⇌ [Ni(en)3]2+(aq) K
yawa3891 [41]

Answer:

3.125\times 10^{-19} mol/L is the concentration of Ni^{2+}(aq) in the solution.

Explanation:

Ni^{2+}(aq) + 3 en\rightleftharpoons [Ni(en)_3]^{2+}(aq)

Concentration of nickel ion = [Ni^{2+}]=x

Concentration of nickel complex= [[Ni(en)_3]^{2+}]=\frac{0.16 mol}{2 L}=0.08 mol/L

Concentration of ethylenediamine = [en]=\frac{0.80 mol}{2 L}=0.40 mol/L

The formation constant of the complex = K_f=4.0\times 10^{18}

The expression of formation constant is given as:

K_f=\frac{[[Ni(en)_3]^{2+}]}{[Ni^{2+}][en]^3}

4.0\times 10^{18}=\frac{0.08 mol/L}{x\times (0.40 mol/L)^3}

x=\frac{0.08 mol/L}{4.0\times 10^{18}\times (0.40 mol/L)^3}

x=3.125\times 10^{-19} mol/L

3.125\times 10^{-19} mol/L is the concentration of Ni^{2+}(aq) in the solution.

6 0
4 years ago
Which of the following would be expected to be good solvents for cyclopentane. Choose all that apply. toluene, CgH5CH3 cyclohexa
Alik [6]

Answer:

cyclohexane

Explanation:

Solubility is determined by the principle ,  "like dissolves like" .

i.e. , if a compound is polar then it will dissolve in a polar compound only , and

if a compound is non - polar then it will dissolve in a non - polar compound only .

Hence , from the question ,

a good solvent for cyclopentane would be cyclohexane ,

since , both the compounds are non polar in nature , hence get solubilized ,

the other options mentioned are polar .

8 0
3 years ago
Na-23 has 12 neutrons. What is it’s atomic number?
Dennis_Churaev [7]

Answer:

11

Explanation:

The atomic number for Na will always be the same regardless of the number of neutrons.

7 0
4 years ago
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