Molar Mass/Conversions

How many moles of sodium chloride are in a 321.8 g sample?

• 18810 moles

• 3.315 x 10²⁴ moles

• 5.507 moles

• 4.767 moles

What is the mass of 2.50 mol of oxygen gas O₂?

• 40.0 g
• 80.0 g
• 16.0 g
• 32.0 g

how many atoms are contained in a 456 g sample of carbon dioxide?

• 10.34 atoms

• 6.237 x 10²⁴ atoms

• 1.871 x 10²⁵atoms

• 2.079 x 10²⁴ atoms

How many atoms would be contained in 454 grams of iron (Fe)?

• 6.02x10²³ atoms
• 8.14 atoms
• 4.90x10²⁴ atoms
• 55.85x10²³ atoms

How many molecules are in 32.4 grams of phosphorous pentoxide?

• 1.76 x 10²³ molecules
• 0.29 moles
• 1.76 x 10²² molecules
• 0.29 molecules

How many grams are in 3.3 mol of Potassium Sulfide?

• 360 g
• 454 g
• 238 g
• 132 g

What is the molar mass of (NH₄)₃PO₄

• 113.02 g/mol

• 124.13 g/mol

• 149.12 g/mol

• 137.00 g/mol

What is the molar mass of AuCl₃?

• 96.00 g/mol

• 130.00 g/mol

• 232.51 g/mol

• 303.32 g/mol

What is the mass of 6.25 mol of Cu(NO₃)₂?

• 126 g

• 785 g

• 625 g

• 1172 g

If I have 6.02 x 10²³ molecules of CO₂, what is the mass?

• 44.0 g

• 2.65 x10²³ g

• 1.37 x10²² g

• 96.0 g