Chapter 11 Chemical Quantities

Which of the following would have the highest number of moles?

• 4g CO₂
• 15g H₂O
• 22g NaCl
• 100g AgCl

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 of sugar (C₆H₁₂O₆) are in a mole?

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

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

What is the mass in grams of 5.90 mol C₈H_18?

• .0512 g

• 19.4 g

• 674 g

• 389 g

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

• 11.8%
• 41.1%
• 47.1%

Tags

NGSS.HS-PS1-7

What is the molar mass of Hydrogen Peroxide (H₂O₂)? **Use the periodic table Ms. Keeler gave you.

• 48.00 g/mole

• 34.02 g/mole

• 36.50 g/mole

• 35.50 g/mole

• 34.01 g/mole

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

Tags

NGSS.HS-PS1-7

How many liters are in 19.82 g Mg(OH)₂?

• 10.75 liters

• 10.7 liters

• 8.0 liters

• 7.611 liters