Types of mole problems:



More types of mole problems:

I. Converting grams to moles:

A. How many moles of each of the following substances are present in:

1. a piece of iron with a mass of 42.6 grams?

2. a sample of chlorine gas (Cl2) with a mass of 4.875 grams

3. a sample of ammonium sulfate, (NH4)2SO4, with a mass of 155.0 grams

II. Converting moles to grams:

A. How many grams of each of the following substances are present in:

1. 20.050 moles of bromine gas (Br2):

2 0.09044 mole of oxygen gas (O2):

3. 1.050 moles of SO3 gas:

4. 2.0 moles of glucose, C6H12O6:

III. Converting grams to atoms, molecules (first convert grams to moles then to atoms/molecules):

A. How many molecules of ozone gas (O3) are present in a 4.00 gram-sample of O3?

B. How many magnesium (Mg) atoms are present in 10.101 grams of Mg?

IV. Converting molecules/atoms to grams:

A. What is the mass in grams of 1.00 x 1014 molecules of oxygen gas (O2)?

B. What is the mass in grams of a single (1) moleculeof sucrose, C12H22O11)?

C. How many grams of sodium (Na) atoms are present in 2.0 x 106 atoms of Na?

Answers:

1) (0.763 mole of Fe)

2) (0.06866 mole of Cl2)

3) (1.174 moles of (NH4)2SO4)

4) (3208.0 grams of Br2)

5) (2.894 grams of O2)

6) (84.11 grams of SO3)

7) (360 grams of C6H12O6)

8) (5.02 x 10 22molecules of O3)

9) (2.5024 x 1023atoms of Mg)

10) (5.32 x 10-9gram of O2)

11) (5.68 x 10-22 gram of sucrose = 6 x 10-22 gram of sucrose)

12) (7.6 x 10-17 gram of Na atoms)

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download