Stoichiometry Mass and Mole Calculations

What is the total mass, in grams, of a 0.75 mole sample of SO₂?

• 16 g

• 24 g

• 32 g

• 48 g

Calculate the mass of iron in a sample of iron ore containing 2.61x10²³ iron atoms.

• 0.433g

• 24.2g

• 44g

• 6.02g

Tags

NGSS.HS-PS1-7

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1

• 1,1,1,2

• 1,2,1,1

• 2,1,1,1

Tags

NGSS.HS-PS1-7

KNO₃ --> KNO₂ + O₂
What coefficients are needed to balance the reaction?

• 2, 2, 1

• 2, 3, 2

• 1, 2, 2

• 1, 3, 1

Tags

NGSS.HS-PS1-7

4.0 moles of H₂O would have what mass?

• 72 g

• 23 g

• 68 g

Tags

NGSS.HS-PS1-7

How many grams are in 7.8 moles of NaCl?

• 476grams

• 460 grams

• 452 grams

What is the molar mass of NaOH?

• 368 g/mole

• 40 g/mole

• 57 g/mole

Tags

NGSS.HS-PS1-7

What is the mass of one mole of AuCl₃?

• 96g

• 130g

• 303.5g

36.0 g of Be contains how many moles?

• 0.25 mol

• 4.0 mol

• 45 mol

Tags

NGSS.HS-PS1-7

A mass of 6 g of Carbon contains

• 1 mole of C

• 2 moles of C

• 0.5 moles of C