Mole and Avogadro

How many grams of NaCl (molar mass = 58.45g) are present in 11.00 moles? (moles to grams)

• 0.4500 g
• 156.6 g
• 331.0 g
• 642.9 g

What is the molar mass of (NH₄)₂CO₃ ?

• 144 g
• 138 g
• 96 g
• 78 g

Which conversion factor should be used to solve the following, "How many moles in 28 grams of CO₂?"

• 1 mol = 22.4 L 
• 1 mol = 44.01 g
• 1 mol = 6.02x10²³ atoms
• more than one

Tags

NGSS.HS-PS1-7

How many moles are there in 440g of carbon dioxide molecules?

• 11
• 10
• 16
• 0.25

Tags

NGSS.MS-PS1-1

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 AlCl₃?

• 5.68 molec AlCl₃
• 5.68x10²⁴ molec AlCl₃
• 0.705 molec AlCl₃
• 1.25x10²³ molec AlCl₃

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³

• 146

• 4.15

• 1.51x10²⁴

Find the mass in grams of 3x 10²³ molecules of F₂."

• 14g

• 56

• 38

• 19g

How many moles are in 19.82 g Mg? 

• 1.226mol Mg
• 481.7mol Mg
• 1.000mol Mg
•  0.8156 mol Mg

How many water molecules are in 5.2 moles of water?

• 6.02 x 10²³
• 5.2
• 3.1 x 10²⁴
• 8.638 x 10^-24