Free Printable Chemistry- Mole Concept

Worksheets

Chemistry- Mole Concept

Total questions: 12

Worksheet time: 27mins

Name

Class

Date

How many molecules of sugar (C₆H₁₂O₆) are in a mole?

24 molecules

180 molecules

180 g

6.02 x 10²³molecules

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

How many atoms of carbon are in 6.00 g of carbon?

1.20x10²⁴atoms C

6.02x10²³atoms C

3.01x10²³atoms C

1.50x10²³atoms C

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

0.05 moles

1.81 x 10⁴⁶ moles

5.00 x 10²¹ moles

5 moles

What is the definition for Avogadro's number?

number of grams per one mole of a substance

whole number ratio that is a multiple of a chemical formula

simplest, whole number ratio of a chemical formula

6.02 x 10^23 particles per one mole of a substance

What is the molarity of 4 g of NaCl (M_rNaCl=58.45 g mol^-1) in 3800 mL of solution?

0.018 M

0.0011 M

1.052 M

0.062 M

What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO₃ to a volume of 250 mL?

15.9 M

0.636 M

0.642 M

1.59 M

Number of atoms in 52 g of He are:

2.865 X 10²³

7.83 X 10²⁴

6.023 X 10²³

5000

How many moles of methane are required to produce 22g of CO₂(g) after combustion ?

2 Moles

1 Moles

0.5 Moles

0.05 Moles

10.

The amount of KClO₃ needed to supply sufficient oxygen for burning 112 L of CO gas at N.T.P is___________.

9.859 g

6.023 g

308.25 g

204.16 g

11.

Calculate the total number of electrons present in 3.2 g of CH₄.

$12.044\times10^{23}$

$6.022\times10^{24}$

$3.011\times10^{24}$

$24.088\times10^{24}$

12.

The atomic masses of two elements (P and Q) are 20 and 40 respectively. x g of P contains y atoms, how many atoms are present in 2x g of Q?

None of the above

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Chemistry- Mole Concept

Total questions: 12

Worksheet time: 27mins

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