Practice: Mole Calculations

If you are given a sample of magnesium with a mass of 48 g, how many moles of magnesium do you have?

• 3 moles

• 1 mole

• 2 moles

• 4 moles

What is the number of moles of calcium in a 120 g sample, if the relative atomic mass of calcium is 40?

• 3 moles

• 4 moles

• 5 moles

• 2 moles

Tags

NGSS.HS-PS1-7

A sample of rock contains 252 g of iron. Calculate the number of moles of iron, given the relative atomic mass of iron is 56.

• 4 moles

• 4.5 moles

• 6 moles

• 5 moles

Tags

NGSS.HS-PS1-7

You are given a sample of sulfur weighing 4,064 g. How many moles of sulfur are present if the relative atomic mass of sulfur is 32?

• 120 moles

• 125 moles

• 130 moles

• 127 moles

If the relative atomic mass of magnesium is 24, how many grams of magnesium would correspond to 1 mole?

• 36 g

• 24 g

• 48 g

• 12 g

Tags

NGSS.HS-PS1-7

How many grams of calcium would make up 2 moles, given the relative atomic mass of calcium is 40?

• 120 g

• 100 g

• 80 g

• 60 g

Tags

NGSS.HS-PS1-7

Calculate the number of moles in 112 g of iron, knowing that the relative atomic mass of iron is 56.

• 4 moles

• 3 moles

• 1 mole

• 2 moles

Given a sample of sulfur weighing 64 g, how many moles are present if the relative atomic mass of sulfur is 32?

• 2 moles

• 1 mole

• 4 moles

• 3 moles

If you have 40 g of calcium, how many moles do you have, given the relative atomic mass of calcium is 40?

• 1.5 moles

• 1 mole

• 2 moles

• 0.5 moles

A sample contains 168 g of iron. How many moles does it contain if the relative atomic mass of iron is 56?

• 5 moles

• 4 moles

• 2 moles

• 3 moles