Lesson on Calculating Molar Mass and Moles and Molecules

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³
• 146
• 4.15
• 1.51x10²⁴

Tags

NGSS.HS-PS1-7

Covalent compounds are called molecules.  Ionic compounds are called formula units.  How many moles of CaO contain 6.02x10²⁵ formula units? 

• 100
• 1
• 56
• 560

Tags

NGSS.HS-PS1-7

How many molecules are in 9.4 moles of AlCl₃?

• 5.66
• 5.66x10²⁴
• 0.705
• 1.25x10²³

Tags

NGSS.HS-PS1-7

How many moles of copper (II) chlorate contain 1.45x10²¹ formula units?

• 8.73x10⁴⁴
• 1.20x10²⁴
• 0.00241
• 1.45

What is the molar mass of sodium?

• 11
• 22.990
• 45.98
• 3

Fluorine is diatomic.  What is the molar mass of fluorine gas?

• 18.998 g/mol
• 37.996 g/mol
• 9 g/mol
• 18 g/mol

What is the mass of one mole of aluminum?

• 26.982 g
• 13 g
• 53.985 g
• 14 g

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol
• 35.453 g/mol
• 22.990 g/mol
• 58.443 g/mol

What is the molar mass of B₂(CO₃)₃?

• 81.632 g/mol
• 94.842 g/mol
• 38.822 g/mol
• 201.648 g/mol

How many moles are in 16.94g of water?

• 16.94
• 0.9403
• 305.2
• 1.063