Mole Review

How many molecules of ammonia [NH3] are found in 34.0 grams of ammonia?

• 34.0g x 6.02x10v23 / 17.04 = 1.20x10v24 molec

• 5.0x10v22 molec x 18.02g / 6.02x10v23 = 0.15g

• 13.94 mol x 22.4L = 312.26L

Tags

NGSS.HS-PS1-7

If you have 13.94 moles of hydrogen gas [H2] at STP, how many liters do you have?

• 34.0g x 6.02x10v23 / 17.04 = 1.20x10v24 molec

• 5.0x10v22 molec x 18.02g / 6.02x10v23 = 0.15g

• 13.94 mol x 22.4L = 312.26L

5.0 x 1021 molecules of water [H2O] is equal to how many grams of water?

• 34.0g x 6.02x10v23 / 17.04 = 1.20x10v24 molec

• 5.0x10v22 molec x 18.02g / 6.02x10v23 = 0.15g

• 13.94 mol x 22.4L = 312.26L

Tags

NGSS.HS-PS1-7

 How many moles are in 13.11 grams of zinc [Zn]?

• 13.11/65.38g = .20mol

• 96.24L x 18.02g / 22.4L=77.43g

• 0.82mol x 159.70g= 130.95g

Tags

NGSS.HS-PS1-7

At STP, how many grams of water vapor [H2O] are in 96.25 liters of the gas?

• 13.11/65.38g = .20mol

• 96.24L x 18.02g / 22.4L=77.43g

• 0.82mol x 159.70g= 130.95g

If you have 0.82 moles of rust [Fe2O3], how many grams do you have?

• 13.11/65.38g = .20mol

• 96.24L x 18.02g / 22.4L=77.43g

• 0.82mol x 159.70g= 130.95g

units for molar mass?

which concepts related to masses in gram to numbers of atoms is always constant?

• The Mole, Molar Mass

• Avogadro's #, standard Molar Volume

Tags

NGSS.HS-PS1-7

• 0.5 moles

• 1 mole

• 2 moles

• 0.25 moles

• 1 mole

• 2 moles

• 0.5 moles

• 4 moles

Tags

DOK Level 2: Skill/Concept