Review for Chem test 2-23-22

Find the mass of 11.37 mol of BaO. Round to 3 significant figures.

• 1,354 g

• 1,740 g

• 17.40 g

• 1,684 g

Determine the number of moles of aluminum nitrate that are in 264 g of the compound.

• 2.97 mol

• 3.45 mol

• 2.73 mol

• 1.86 mol

Determine the amount of moles in Copper (I) bromide that are in 276.9 g of the compound.

• 3.22 mol

• 1.07 mol

• 2.14 mol

• 1.93 mol

Find the mass of 5.82 mol of magnesium chloride. Round to three sig figs!

• 554 g

• 347 g

• 55.2 g

• 565 g

Find the mass of 3.60 mol of Au.

• 844 g

• 709 g

• 436 g

• 197g

Determine the number of moles of potassium nitrate that are in 784 g of the compound.

• 7.22 mol

• 6.90 mol

• 10.6 mol

• 7.75 mol

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆? 

• 1 mole = 78.12 g
• 1 mole = 22.4 L 
• 1 mol = 6.02x 10²³ particles 
• more than one

The number 6.02 x 10²³, which is the number of particles found in a mole. 

• molar mass
• mole
• Avogadro's number
• hydrate

How many molecules are in 9.44 moles of AlCl₃?

• 5.68 molecules AlCl₃

• 5.68x10²⁴ molecules AlCl₃

• 0.705 molecules AlCl₃

• 1.25x10²³ molecules AlCl₃

How many molecules of sugar (C₆H₁₂O₆) are in a mole?

• 24 molecules
• 180 molecules
• 180 g
• 6.02 x 10²³ molecules