Stoichiometry Moles

What is the total number of moles contained in 115 g of C₂H₅OH?

• 0

• 1.5

• 3.0

• 2.5

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

• 16 g

• 24 g

• 32 g

• 48 g

Find the mass of 5 moles of water.

• 18.02 g

• 36.04 g

• 90.1 g

• 25.0g

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

How many moles are present in 25 grams of NaCl?

• 0.427 moles

• 0.150 moles

• 0.625 moles

• 0.312 moles

Convert 50 grams of Fe2O3 to moles.

• 0.625

• 0.313

• 0.750

• 0.125

If 0.5 moles of Al react with excess HCl, how many grams of AlCl3 are produced in the reaction 2Al + 6HCl -> 2AlCl3 + 3H2?

• 72.89 grams

• 45.32 grams

• 60.14 grams

• 66.67 grams

Tags

NGSS.HS-PS1-7

How many moles of H2 are needed to react with 1 mole of N2 in the reaction N2 + 3H2 -> 2NH3?

• 1 mole of H2

• 2 moles of H2

• 3 moles of H2

• 4 moles of H2

If 4 moles of O2 react with excess CH4, how many grams of CO2 are produced in the reaction CH4 + 2O2 -> CO2 + 2H2O?

• 176.04 grams

• 88.02 grams

• 44.01 grams

• 352.08 grams

What is the mass of 2 moles of CO2?

• 66.02 grams

• 88.02 grams

• 132.04 grams

• 44.01 grams