Free Printable 3/24-2/27 Project/ Oscar

1.

How Many Br are there? $MgBr_2$

a)

2

b)

3

c)

1

d)

4

2.

How many Oxygens are present? $3Mg\left(NO_3\right)_2$

a)

5

b)

3

c)

2

d)

6

3.

What is the Law of Conservation of Mass?

a)

Mass of Reactants > Mass of Products

b)

Mass of Reactants = Mass of Products

c)

Mass of Reactants < Mass of Products

d)

Mass of Reactants - Mass of Products

4.

What are the reactants? $2H_2O\rightarrow2H_2\ +\ O_2$

a)

$2H_2O$

b)

$O_2$

c)

$2H_2+O_2$

d)

$H_2$

5.

What is the number in front of a compound called?
Ex: $2H\ +O$

a)

Subscript

b)

Coefficient

c)

Reactant

d)

Product

6.

Solve: $4Ca_3N_2$

a)

Ca-12 N-8

b)

Ca-3 N-2

c)

Ca-6 N-10

d)

Ca-16 N-10

7.

How many elements are present? $(NH_4)_2PO_4$

a)

3

b)

2

c)

5

d)

4

8.

What do Subscripts show?

a)

how many molecules of each compound there are.

b)

how many of each reactant that are present.

c)

how many atoms of each element are present in each compound.

d)

how many of each product that are present.

9.

What is a balanced equation?

a)

Equaling on both sides of reactants and products

b)

Subtracting the reactants and products

c)

Adding the reactants and products

d)

Multiplying the reactants and products

10.

How many Mg are present? $3Mg(SO_4)$

a)

4

b)

1

c)

3

d)

2

11.

What do coefficients show?

a)

show how many products are present in each compound.

b)

show how many molecules of each compound there are.

c)

show how many reactants are present in each compound.

d)

show how many atoms of each element are present in each compound.

12.

What are the products? $2H_2O→2H_2+O_2$

a)

$2H_2+O_2$

b)

$O_2$

c)

$2H_2O$

d)

$H_2$

13.

How many Hydrogens are present? $Mg\left(OH\right)_2$

a)

4

b)

2

c)

1

d)

3

14.

How many Hydrogens are present? $5\left(NH_4\right)_2O$

a)

8

b)

10

c)

40

d)

34

15.

How many Oxygens are present? $3Ca\left(ClO_3\right)_2$

a)

6

b)

18

c)

4

d)

12

16.

What is the yield sign? $SO_3+H_2O\rightarrow H_2SO_4$

a)

$\rightarrow$

b)

$\leftarrow$

c)

$SO_3$

d)

$H_2O$

17.

Solve: $2CrCl_3$

a)

Cr-2 Cl-6

b)

Cr-2 Cl-3

c)

Cr-6 Cl-2

d)

Cr-3 Cl-2

18.

How many Sulfurs are present? $3Mg\left(SO_4\right)$

a)

4

b)

12

c)

3

d)

1

19.

What is the number behind the compound called? Ex: $O_2$

a)

Coefficient

b)

Yield

c)

Subscript

d)

Reactant

20.

How many Hydrogens are present? $3NH_3$

a)

9

b)

3

c)

6

d)

2

3/24-2/27 Project/ Oscar

Total questions: 20

Worksheet time: 2hrs 40mins

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