The Mole

Atoms

100

1 mole is equal to how many atoms or molecules?

6.02 x 10²³

200

How many moles in 3.011 x 10²³ atoms Mg?

0.5 mol Mg

300

12.04 x 10²³ atoms is how many moles? 

2 moles

400

How many atoms in 0.250 mol S?

1.51 x 10^23 atoms S

500

How many atoms in 0.02550 g Pt?

Hint: You need the molar mass of Platinum

0.02550g x 1mol/195.084g = 0.0001307 mol

0.0001307 x 6.02 x10²³

7.872 x 10¹⁹ atoms Pt

Moles

100

What is the mass (g) of 1.00 mol Li?

6.94 g Li

200

How many atoms in 6.755 mol Pb?

6.755 x 6.02x10²³

40.68 x 10²³ atoms Pb

4.068 x 10²⁴ atoms Pb

300

How many moles in 0.00750 g Ag? (in scientific notation)

6.95 x 10^-5 mol Ag

400

How many moles in 2.25 x 10²⁵ atoms Zn?

37.4 mol Zn

500

How many moles in 150 g S?

4.7 mol S

Grams

100

How many moles in 2.65 g Fe?

0.0474 mol Fe

200

How many grams in 6.50 moles Cu

413 g Cu

300

How many moles are in 0.535 g Zn?

0.00818 mol Zn

400

How many grams in 4.50 x 10^12 atoms Cl?

2.65 x 10^-10 g Cl

500

How many grams in 8.42 x 10¹⁸ atoms Br?

0.00112 g Br

Molarity

100

how many moles are needed to make a 3M solution using 1L of water?

3M x 1L = 3 moles

200

How many moles of a chemical are needed to make a 2M solution in 500ml of water?

convert 500ml to L = 0.5L

2M x 0.5L

= 1 mole

300

How many moles of a chemical are needed to make a 0.2M solution in 20ml of water?

convert 20ml to 0.020L

0.2M x 0.020L

= 0.004 moles

400

What is the mass of HCl needed to make a 3M solution in 1L of water?

3M x 1L = 3 moles 

3 moles HCl x 36.453g = 109.359 grams HCl

500

What is the mass of HBr needed for a 0.2M solution in 500mL of water?

500mL = 0.5L

0.2M x 0.5L = 0.1 moles 

0.1 moles x 80.91g = 8.091g HBr

Miscellaneous

100

How many items are in a mole?

6.02 x 10^23 items

200

How is the mass in grams of the element converted to number of atoms?

Divided by molar mass, then multiply by Avogadro's Number

300

What is the mass of a mole of an element?

The amu of the element found on the periodic table

400

What does amu stand for?

Atomic mass unit

500

How many moles of Aluminum are needed in 5 moles of Al₂O₃?

5 moles of Al₂O₃ requires 10 moles of aluminum.