Free Printable Chapter 3: The mole concept, chemical formula and equation

Worksheets

Chapter 3: The mole concept, chemical formula and equation

Total questions: 10

Worksheet time: 25mins

Name

Class

Date

What is the volume at room conditions of a sample of ammonia gas, NH₃ with the mass of 5.1 g?

7.2 dm³

12 dm³

14.4 dm³

18 dm³

Which of the following is the correct chemical formula for copper(II) iodide?

CuI

Cu₂l

CuI₂

Cu₂l₂

1.2 g of element Y combines with bromine to form 6 g of a compound with the empirical formula of YBr₂. What is the relative atomic mass of element Y?

[Relative atomic mass: Br = 80]

The following is a chemical equation:

H₂SO₄(aq) + 2KOH(aq) → K₂SO₄(aq) + xH₂O(l)

What is the value of x?

The complete burning of ethanol is as follows.

C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)

What is the volume of oxygen gas needed at room conditions to burn 9.2 g of ethanol completely?

[Relative atomic mass: H = 1, C = 12, O = 16; Molar volume = 24 dm³ mol^-1 at room conditions]

4.8 dm³

9.6 dm³

14.4 dm³

19.2 dm³

Calculate the number of iron atoms in an iron nail.

6.10 x 10^22

3.36 x 10^25

1.42 x 10^23

6.023 x 10^25

A mole of Neon contains
6.02 x 10²³_____.

atoms

formula units

ions

molecules

How many moles are in 3.01 x 10²² atoms of magnesium?

0.0500 moles

1.81 x 10⁴⁶ moles

5.00 x 10²¹ moles

5.00 moles

Determine the molar mass for CCl₄

153.8 g/mol

47.54 g/mol

189.35 g/mol

82.9 g/mol

10.

How many grams are in 1.2 x 10²⁴ molecules of CO? (molar mass of CO = 28 g/mol)

28.2 g

55.8 g

6.02 g

1.2 g

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Chapter 3: The mole concept, chemical formula and equation

Total questions: 10

Worksheet time: 25mins

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