HW 3.2 The Mole

How many moles of magnesium are in 3.01 x 10²² atoms of magnesium?

How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆?

• 2.41 x 10²⁴ molecules C₆H₁₂O₆

• 6.02 x 10²³ molecules C₆H₁₂O₆

• 1.44 x 10²⁵ molecules C₆H₁₂O₆

• 7.22 x 10²⁵ molecules C₆H₁₂O₆

How many moles are in 1.20 x 10²⁵ atoms of phosphorus?

How many atoms of oxygen are there in 0.400 moles of N₂O₅?

• 2.41 x 10²³ atoms O

• 4.82 x 10²³ atoms O

• 1.20 x 10²⁴ atoms O

• 3.01 x 10²⁴ atoms O

How many moles in 28 grams of CO₂?

• 44 mol CO₂

• 28 mol CO₂

• 0.64 mol CO₂

• 3.9 x 10²³ mol CO₂

Find the number of moles of argon (Ar) in 452 g of argon.

Find the mass of 2.60 mol of lithium bromide (LiBr).

Find the mass, in grams, of 1.00 x 10²³ molecules of N₂.

• 4.65 g N₂

• 0.166 g N₂

• 2.33 g N₂

• 0.332 g N₂