Free Printable Reactions & Moles

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Reactions & Moles

Total questions: 20

Worksheet time: 31mins

Name

Class

Date

What is the molar mass of table salt (NaCl)?

116.886 g/mol

35.453 g/mol

22.990 g/mol

58.443 g/mol

Which of the following is an example of synthesis?

Na + Br₂--> NaBr

KClO₃--> KCl + O₂

HgO + Cl₂-->HgCl + O₂

Cl₂ + NaBr --> NaCl + Br₂

Balance this reaction:

____ Na₃PO₄ + ____ KOH ---> ____ NaOH + ____ K₃PO₄

1,3,3,1

1,3,2,1

2,3,3,1

1,1,3,1

3Ca + 2AlCl₃ --> 3CaCl₂+2Al

Synthesis

Decomposition

Single diplacement

Double displacement

3KOH + H₃PO₄ --> K₃PO₄+3H₂O

Synthesis

Decomposition

Single displacement

Double displacement

Which reaction type is the following: C₅H₁₀O₄ + O₂ --> CO₂ + H₂O

Decomposition

Single Replacement

Combustion

Double Replacement

Balance this equation
_Zn+_HCl-->_ZnCl₂+_H₂

1,1,2,1

1,1,1,2

1,2,1,1

2,1,1,1

What is the molar mass of Cl₂?

17 g/mol

35.5 g/mo;

71.0 g/mol

89 g/mol

Calculate the molar mass of water (H₂O).

10 g/mol

17 g/mol

18 g/mol

34 g/mol

10.

Molar mass is in units of ________.

grams

grams/mole

mole

moles/gram

11.

How many moles are present in 32.3 grams of CO₂? (Hint: the molar mass of CO₂is 44.01 g/mol)

44.01 moles

1421.52 moles

32.3 moles

0.73 moles

12.

Which side of a chemical equation is the reactant side?

Left (before the yields sign)

Right (after the yields sign)

13.

Which side of a chemical equation os the product side?

Left (before the yields sign)

Right (after the yields sign)

14.

What does the Law of Conservation of Mass state?

Matter cannot be gained or lost in a chemical reaction.

Matter can only be lost in a chemical reaction.

Matter can only be gained in a chemical reaction.

Matter can be gained and lost in a chemical reaction.

15.

Number of H in 3(NH₄)₂CrO₄

16.

Balance the following:

____ Fe + ____ Cl₂ → ____ FeCl₃

1,1,2

1,3,1

2,2,3

2,3,2

17.

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

the product is doubled

the product is half the mass of the reactants

the mass is the same

the mass changes depending on the reaction

18.

Identify the type of reaction: KClO₃ --> KClO + O₂

synthesis

combustion

single replacement

decomposition

19.

What is a mole?

6.022 x 10²³ particles of any substance

A small burrowing animal

A dark spot on your skin

A spy

20.

One mole is equivalent to how many liters at STP (standard temperature and pressure)?

6.02 x 10²³ L

22.4 L

1 L

Reset

Reactions & Moles

Total questions: 20

Worksheet time: 31mins

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