Mole Conversions & Percent Composition

How many moles are in 16.94g of water?

• 16.94 mol H₂O
• 0.9401 mol H₂O
• 305.3 mol H₂O
• 1.063 mol H₂O

How many molecules are in 9.44 moles of aluminum chloride (AlCl3)?

• 5.68 molecules AlCl₃

• 5.68x10²⁴ molecules AlCl₃

• 0.705 molecules AlCl₃

• 1.25x10²³ molecules AlCl₃

How many grams are in 3.3 mol of potassium sulfide - K2S?

• 360 g

• 454 g

• 238 g

• 132 g

Tags

NGSS.HS-PS1-7

How many molecules are in 2.5 mol of sodium chloride - NaCl?

• 1.51x10²³

• 146

• 4.15

• 1.51x10²⁴

Find the percent composition of hydrogen in ammonium sulfide - (NH4)2S.

• 11.8%

• 41.1%

• 47.1%

Which of the following dimensional analysis setups will correctly convert 27.76g of Li to atoms of Li?

• A
• B
• C
• D

What is the mass percentage of carbon in carbon dioxide?

• 27.3%
• 42.9%
• 57.1%
• 72.7%

How many grams are in 7.66 x 10²⁴ molecules of dinitrogen pentoxide (N2O5)?

• 1370 g

• 4.26 x 10²² g

• 1650 g

• 4.26 x 10⁴⁶ g

Tags

NGSS.HS-PS1-7

What is the molar mass of dihydrogen dioxide ?

• 48 g/mol
• 34.02 g/mol
• 36.5 g/mol
• 35.5 g/mol

Tags

NGSS.HS-PS1-7

How many formula units are there in 62 g of zinc (II) phosphate - Zn3(PO4)2?

• 1.9 x 10²⁶ F.U.

• 9.6 x 10²² F.U.

• 3.7 x 10²⁵ F.U.

• 3.1 x 10²⁴ F.U.