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vampirchik [111]
3 years ago
15

In general, what is the relationship between temperature and the reaction rate of a chemical reaction? A. When temperature incre

ases, the number and energy of collisions between particles increases, which increases the rate of the reaction. B. When temperature increases, the activation energy required for the reaction increases, which decreases the rate of the reaction. C. When temperature increases, the reaction becomes more endothermic, which increases the rate of the reaction. D. When temperature increases, the reaction becomes more exothermic, which decreases the rate of the reaction.
Chemistry
1 answer:
riadik2000 [5.3K]3 years ago
3 0

Answer:

A. When temperature increases, the number and energy of collisions between particles increases, which increases the rate of the reaction.

Explanation:

The reaction rate measures the speed with which a reaction proceeds. Based on the collision theory of reaction rates, the rate of a given reaction depends on the number of collisions per time and how successful or effective the collisions are.

Reaction rate in view of the collision theory is very related to concentration and temperature. Both properties are directly proportional to the rate of a reaction.

As temperature increase, the rate of the reaction increases due to the number of effective collisions and the energy of between colliding particles.

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1. An unknown amount of mercury (II) oxide was decomposed in the lab. Mercury metal was formed and 4.50 L of oxygen gas was rele
Musya8 [376]

Answer:

1. 59.1 g HgO

2. A.) 38.2 L

3. B.) It is directly proportional to the number of moles of the gas.

Step-by-step explanation:

1. Mass of HgO

We know we will need a chemical equation with masses and molar masses, so let's gather all the information in one place.

M_r:   216.59

          2HgO ⟶ 2Hg + O₂

(a) Calculate the <em>moles of O₂</em>  

pV = nRT            Divide each side by RT  

 n = (pV)/(RT)  

<em>Data: </em>

p = 0.970 atm  

V = 4.50 L  

R = 0.082 06 L·atm·K⁻¹mol⁻¹  

T = 390.0 K  

<em>Calculation: </em>

n = (0.970 × 4.500)/(0.082 06 × 390.0)  

n = 0.1364 mol O₂

(b) Calculate the <em>moles of HgO </em>

The molar ratio is 1 mol O₂/2 mol HgO.

Moles of HgO = 0.1364 mol O₂ × (2 mol Hg/1 mol O₂)

Moles of HgO = 0.2728 mol HgO

(c) Calculate the <em>mass of HgO </em>

Mass of HgO = 0.2728 mol HgO × (216.59 g HgO/1 mol HgO)

Mass of HgO = <em>59.1 g HgO</em>

This isn't any of the options in your list. Have I made an error?

2. Volume of Hydrogen

              Mg + 2HCl ⟶ MgCl₂ + H₂

n/mol:              3.00

(a) Calculate the <em>moles of H₂ </em>

The molar ratio is (1 mol H₂/2 mol HCl).

Moles of H₂ = 3.00 mol HCl × (1 mol H₂/2 mol HCl)

Moles of H₂ = 1.50 mol HCl

(b) Calculate the <em>volume of H₂ </em>

pV = nRT     Divide both sides by p

 V = (nRT)/p

<em>Data: </em>

n = 1.50 mol

T = 298 K

p = 0.960 atm

<em>Calculation: </em>

V = (1.5 × 0.082 06 × 298)/0.960

V = 38.2 L

3. Volume of gas

pV = nRT

 V = nRT/p

If T and p are constant, (RT)/p = constant = k

V = kn

V ∝ n

The volume is directly proportional to the number of moles of the gas.

3 0
4 years ago
Write the balanced equation for the reaction that occurs when methanol, CH3OH (I) is burned in air. What is the coefficient of m
IRISSAK [1]

Answer:

(C) 2

Explanation:

Methanol is an organic compound which burns with oxygen to produce carbon dioxide and water.

2CH_3OH_{(l)}+3O_2_{(g)}\rightarrow 2CO_2_{(g)}+4H_2O_{(g)}

Multiply coefficients times subscripts for each element in the formula, We get that there are 2 number of atoms of the carbon, 8 number of atoms of the hydrogen, and 8 number of atoms of the oxygen on both sides of equation. Hence, it is balanced.

<u>The coefficient of methanol from the balanced reaction is 2.</u>

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andrey2020 [161]

Answer: The answer is D.

Explanation:

The form of energy associated with the motion, position, or shape of an object is called mechanical energy. An object's mechanical energy is a combination of its potential energy and its kinetic energy. The basketball has both potential energy and kinetic energy.

Hope this helps!

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D because community is also full of abiotic factors
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Answer:

Anuclear power plant is used to generate electricity

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