Aqa Gcse Chemistry Moles

What is the formula to calculate the number of moles in a sample?

• Moles = mass of sample/concentration
• Moles = molar mass/mass of sample
• Moles = mass of sample/molar mass
• Moles = distance/time

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-7

What is the relative atomic mass of magnesium (Mg) - group 2?

• 12

• 20

• 24

• 40

What is the relative molecular mass of a nitrogen molecule (N₂)?

• 28

• 14

• 7

• 21

What is the relative formula mass of Potassium Bromide (K Br)?

• 74

• 99

• 54

• 119

What is the molar mass of water?

• 33
• 18
• 10
• 3

What is the number of moles in 12g of carbon?

• 2
• 0.1
• 1
• 20

What is the number of moles in 180g of water?

• 1
• 0.1
• 6
• 10

What is a Avogadro's constant?

• 6.02 X 10²³
• 6.02 X 10²²
• 6.02 X 10³²
• 6.02

Tags

NGSS.HS-PS1-7

What is the number of moles of there are 3.10X10²³ particles?

• 0.5
• 5
• 50
• 2

What is the number of particles in 22g of carbon dioxide?

• 3.01X10²³
• 6.02X10²³
• 0.5
• 2