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CP Chemistry Chemical Reaction Basics (4/17/2025)

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Last updated 8 months ago
12 questions
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2
2
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4
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3
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Question 1
1.

  1. The skeleton chemical equation for the reaction between zinc metal and hydrochloric acid is shown. What change needs to be made in order to balance this reaction equation?
Zn + HCl → ZnCl2 + H2

Question 2
2.

Examine the following reaction, then identify the reactants and products:

H2O2 --> H2O + O2

  • O2
  • H2O2
  • H2O
  • Reactant(s)
  • Product(s)
Question 3
3.

Is it possible to have a chemical reaction where there is only one reactant?

Question 4
4.

If a gas is produced in a chemical reaction, does that gas count as a product?

Question 5
5.

Balance the Equation(use the format of 2, 4, 1,3)

____N2 + ____O2 + ____H2O → ____HNO3

Question 6
6.

Balance the Equation(use the format of 2, 4, 1)

____Al + _____Br2 → ____AlBr3

Question 7
7.

Students want to gather evidence for the claim that the number of atoms before a chemical reaction is equal to the number of atoms after the chemical reaction. They decide to react vinegar and baking soda in a sealed plastic bag. Which of the following would provide the evidence the students need?

Question 8
8.

Which of the following is true regarding the atoms involved in a chemical reaction?

Question 9
9.

Match the nonmetal with its expected reaction product.

Draggable itemarrow_right_altCorresponding Item
Oxygen with iron sulfide
arrow_right_alt
Iron oxide and sulfur dioxide
Fluorine with potassium iodide
arrow_right_alt
Potassium fluoride and iodine
Chlorine with sodium bromide
arrow_right_alt
Sodium chloride and bromine
Question 10
10.

Identify the reaction types based on these metals.

Draggable itemarrow_right_altCorresponding Item
Iron with hydrochloric acid
arrow_right_alt
Produces sodium hydroxide and hydrogen
Calcium and sulfur
arrow_right_alt
Gives iron chloride and hydrogen gas
Sodium reacts with water
arrow_right_alt
Results in calcium sulfide
Question 11
11.

What is the total number of atoms in 2H2 + O2?

Question 12
12.

In balancing 3H2 + O2 → 2H2O, which is the coefficient of O2?