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Reactions - bal, types, mol-mol stoich

Total questions: 15

Worksheet time: 23mins

Name
Class
Date
1.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 → Fe2O3
a)
4Fe + 3O
 → 2Fe2O3
b)
2 Fe + 3O2 
→ Fe2O6
c)
4 Fe + O6 
→ 2Fe2O3
d)
Fe + O2 
→ Fe2O3
2.

What is the total number of atoms in  5Na3PO4?

a)
5
b)
40
c)
55
d)
60
3.
What is the arrow in a chemical equation?  →
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
4.
What kind of reaction is this?
Mn + 2 HNO3 → Mn(NO3)2 + H2
a)
synthesis
b)
decomposition
c)
single displacement
d)
double displacement
5.

Which kind of reaction is this? H2CO3 → H2O + CO2

a)
synthesis
b)
decomposition
c)
single displacement
d)
double displacement
6.
What are the products of all hydrocarbon combustion reactions?
a)
→ CO2 + H2O
b)
→ CO + H2O
c)
→ CaC2 + CO
d)
→ 2 H2O
7.
Which of these is NOT conserved when a chemical equation is balanced?
a)
atoms
b)
mass 
c)
moles
d)
all of these are conserved
8.
If 1 gram of sugar is dissolved in 125 grams of water, what is the mass of the solution.
a)
a little less than 125 grams
b)
126 grams
c)
more than 125 grams but less than 126 grams
d)
124 grams
9.

2 Fe2O3(s) + 3 C(s) → 4 Fe(s) + 3 CO2(g)

How many moles of iron will be produced if 6 moles of Carbon react completly?

a)

4 moles

b)

6 moles

c)

7 moles

d)

8 moles

10.

Copper(II) chloride and aluminum react to produce aluminum chloride and copper. Which of the following is the correctly balanced chemical equation for this reaction?

a)

CuCl2 + Al → AlCl3 + Cu

b)

3CuCl2 + Al → AlCl3 + 2Cu

c)

3CuCl2 + 2Al → 2AlCl3 + 3Cu

d)

CuCl2 + 3Al → AlCl3 + 2Cu

11.
All of the following are indicators of a chemical reaction except one.  Which one is NOT an indicator that a chemical reaction has taken place?
a)

the production of heat or light

b)

a change in color

c)
the production of gas bubbles
d)
the dissolving of one substance in another
12.

Which statement is TRUE concerning this reaction?

NaHCO3(aq) + CaCl2(aq) → CaCO3(s) + H2O(l) + CO2(g)

a)

The (s) after the product CaCO3 means it is a solution.

b)

The (g) after the product CO2 means it is intended to be measured in grams

c)

The reactant NaHCO3 was made by dissolving it in water.

d)

The water that forms in the reaction is a precipitate.

13.

What type of reaction is Fe + H2SO4 → H2 + FeSO4

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

Double Replacement

14.

What type of reaction is K2CO3 → K2O + CO2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

Double Replacement

15.

What type of reaction is NaOH + HCl → H2O + NaCl

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

e)

Double Replacement