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dezoksy [38]
3 years ago
10

HELP PLEASE!

Chemistry
1 answer:
Yuki888 [10]3 years ago
4 0

Answer:

1. Carbon dioxide, increase of green house gas

2. Stop deforestation, cut down amount of cars on the road (encourage public to take public transport), reduce the amount of time u on the air-conditioning

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4. Use the atomic model to answer the following questions
Valentin [98]

Answer:

´protons: 16

neutrons: 16

name: sulfur

Explanation:

7 0
3 years ago
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
Which of these is true concerning an endothermic reaction? *
Anna [14]

Answer:

A system absorbs more energy than it releases and has a positive AH  

Explanation:

Answer:

Explanation:

Endothermic (endo = into + thermic = heat) means that heat energy is going into a system.

The products will have more energy than the reactants and ΔH will be positive.

A is wrong, because ΔH is positive.

C and D are wrong, because the system absorbs more energy than it releases.

5 0
3 years ago
A 10 M concentrated stock solution of NaCl was used to prepare 5 liters of diluted 1 M solution. Which of the following statemen
vfiekz [6]

Answer:

D. The volume of the solvent used was less than 5 liters.

Explanation:

  • We have the rule: the no. of moles before dilution equal the no. of moles after dilution.

<em>(MV) before dilution = (MV) after dilution.</em>

M before dilution = 10.0 M, V before dilution = V of stock = ??? L.

M after dilution = 1.0 M, V after dilution = 5.0 L.

<em>V before dilution = V of stock = (MV) after dilution/M before dilution</em> = (1.0 M)(5.0 L)/(10.0 M) = <em>0.5 L.</em>

∴ The volume of the stock used is 0.5 L.

The volume of the solvent used is 4.5 L.

  • So, the right choice is:

<em>D. The volume of the solvent used was less than 5 liters.</em>

7 0
3 years ago
Read 2 more answers
Calculate the molarity of 65.3 grams of sugar(342.3 g/mol), c12h22011 in 750 ml of solution.
k0ka [10]

Answer:

0.254 M

Explanation:

If the formula mass of sugar is 342.3 g/mol, and there are 65.3 g, then there are 65.3/342.3=0.190768 mol.

Also, 750 mL = 0.750 L.

molarity = (moles of solute)/(liters of solution)

molarity = 0.190768/0.750 = <u>0.254</u><u> </u><u>M</u>

8 0
2 years ago
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