G10 Mole calculations

What is the unit for molar mass?

• no unit
• g
• g mol^-1

Tags

NGSS.HS-PS1-7

What is the volume of 2 moles of nitrogen gas at STP?

• 0.0714 dm³

• 0.089 dm³

• 2 dm³

• 44.8 dm³

How many magnesium ions are there in 4 moles of Mg₃(PO₄)₂?

• 3 mol

• 4 mol

• 7 mol

• 12 mol

How many ions are there in 3.76 moles of NaCl?

• 4.51 x 10²⁴
• 4.53 x 10²⁴
• 8.13 x 10²⁴
• 8.87 x 10²⁵

How many particles are in 13.5 grams of Beryllium?

• 1.5 particles
• 9 particles
• 4x10²³ particles
• 9x10²³ particles

Tags

NGSS.HS-PS1-7

Calculate the number of gold atoms in a 4 mole sample of gold.

• 2.41x10²⁴
• 3.01x10²³
• 4.82x10²⁴
• 6.02x10²³

Tags

NGSS.HS-PS1-7

Calculate the mass of iron in a sample of iron ore containing 2.61x10²³ iron atoms.

• 0.433g
• 24.2g
• 44g
• 6.02g

Tags

NGSS.HS-PS1-7

Calculate the mass of oxygen present in a 60 g sample of Aluminum oxide, Al₂O₃.

• 29.28

• 9.41

• 56.58

• 28.24

Calculate the number of oxygen atoms present in 8 kg of Ba(NO₃)₂

• 30.616 atoms

• 1.84 x 10²⁵ atoms

• 1.84 x 10²² atoms

• 3.68 x 10²² atoms

Which represents the greatest mass of sulfur?

• 1 gram of sulfur
• 1 molecule of sulfur
• 0.5 mole of sulfur
• 6.02 x 10²³ atoms of sulfur