Grade 11 Chemical calculations

How many moles are in 225 g of CO?

• 28.01 mole

• 4.82 x 10²⁴ mole

• 6,302,25 mole

• 8.0357 mole

What is the total number of atoms in 1.0 mole of CO₂?

• 1.5 x 10²³
• 12 x 10²³
• 3 x 10²³
• 18 x 10²³

The total number of sodium atoms in 46.0 grams is

• 3.01 x 10²³
• 6.02 x 10²³
• 12 x 10²³
• 24 x 10²³

Which sample of O₂ contains a total of 3 x 10²³ molecules?

• 1.0 moles
• 2.0 moles
• 16.0 grams
• 32.0 grams

The total number of molecules in 34.0 grams of NH₃ is equal to 

• 1.00 x 22.4
• 2.00 x 22.4
• 1.00 (6.02 x 10²³)
• 2.00 (6.02 x 10²³)

What is the mass of 3.0 x 10²³ atoms of neon?

• 1.0 g

• 0.5 g

• 9.97g

• 20.0 g

What is the number of moles of N₂ that contains 9.03 x 10²³ molecules?

• 0.667
• 1.50
• 33.6
• 42.0

Which represents the greatest mass of chlorine?

• 1 mole of chlorine
• 1 atom of chlorine
• 1 grams of chlorine
• 1 molecule of chlorine

What is the total number of atoms contained in 80 grams of neon?

• 6.02 x 10²³
• 1.2 x 10²⁴
• 2.4 x 10²⁴
• 4.8 x 10²⁴

Which mass contains 6.0 x 10²³ particles ?

• 6.0 g of carbon

• 16 g of sulfur

• 3.0 g of helium

• 28 g of silicon