The Mole & Stoichiometry

The mole is 6.022 x 10²³ atoms or molecules of any substance. This number is also named after the scientist who calculated it. This was:

• Perrin

• Avogadro

• Einstein

• Newton

How do you find the molar mass for an element?

• Molar mass is the same as atomic mass, only in grams

• You convert into molar mass from a mass given to you

• You can only be given molar mass, it can't be calculated

• It is equal to Avogadro's Number

How many moles of Carbon would be in 3 moles of CH₄?

• 24

• 5

• 3

• 20

How many moles of Hydrogen would be in 5 moles of CH₄?

• 24

• 5

• 3

• 20

How many grams is one mole of Sodium?

• 32.07

• 118.71

• 150.36

• 22.99

How many grams is 2 moles of Helium?

• 4.00

• 8.00

• 2.02

• 4.04

How many moles are 156.00 grams of Chromium?

• 4

• 52

• 3

• 1

How many moles would 91 grams of Magnesium be?

• 8.4

• 21

• 2.5

• 3.6

What is the molar mass of Sucrose (C₁₂H₂₂O₁₁)?

• 182.00 g

• 45.00 g

• 342.34 g

• 377.85 g

40 moles of Helium (He) would have a mass of:

• 160 g

• 80 g

• 320 g

• 6.022 x 10²³ g