Other Chemistry Answers

_______ is a variable in Arrhenius equation. *

a. reactant concentration

b. order of reaction

c. reaction rate

d. temperature

___________ provides a linear equation that allows for the calculation of the concentration of a reactant at a specific time in the reaction. *

a. Chemical kinetics

b. Arrhenius equation

c. Integrated rate law

d. catalysts

Reaction rates can be explained using the concepts of collision theory and __________. 

a. Arrhenius equation

b. Chemical kinetics

c. activation energy

d. progress of reaction

A reaction mechanism may occur in two or more elementary steps. The slowest among these steps is the _____________. 

a. reaction intermediate step

b. overall reaction

c. rate - determining step

d. reaction rate

Reaction rates are affected by reactant concentration and _________. 

a. time

b. temperature

c. collision

d. activation

1. When 10g of N2 and 7g H2 are allowed to react. Determine the limiting reactant and excess reactant in this reaction.

N_{2}+H_{2} ->NH_{3}

Given:

Find:

Solution:

TEST 2. PROBLEM SOLVING

Solve the problem below. Show your answers legibly, concisely, and completely. Use the back portion if necessary.

1. Determine the limiting reactant and excess reactant, when 36g of Al and 28.5g of HBr are reacted and how many grams of H_{2} gas are formed?

Al + HBr -> AlB*r_{3} + H_{2}

Given:

Find:

Solution:

Problem: If 68 g of Zn reacts with 27.5 g of HCl. Use the chemical equation to answer the following questions below.

Zn + 2HCl -> ZnC*l_{2} + H_{2}

1. What is the molar mass of Zn?

2. What is the molar mass of HCI?

3. What coefficient is indicated in HCI?

4. Which substance is limiting reactant?

5. Which substance is excess reactant?

6. What is the molar mass of ZnCl_{2} ?

If you react 5.625 L of H2S in excess oxygen, how many grams of water will be produced

Explain this phrase: "likes dissolves like"

If 149.1 g of KCI is dissolved in water to make 500 ml solution, what is the molarity of the solution?