Moles Stoichiometry

How many moles are present in 25 grams of NaCl?

• 0.427 moles

• 0.150 moles

• 0.625 moles

• 0.312 moles

What is the mass of 2 moles of CO2?

• 66.02 grams

• 88.02 grams

• 132.04 grams

• 44.01 grams

Convert 50 grams of Fe2O3 to moles.

• 0.625

• 0.313

• 0.750

• 0.125

Tags

NGSS.HS-PS1-7

In the reaction 2H2 + O2 -> 2H2O, if 5 moles of H2 are reacted with 2 moles of O2, which is the limiting reactant?

• O2

• H2O2

• H2

• H2O

Tags

NGSS.HS-PS1-7

How many grams of NH3 can be produced from 28 grams of N2 in the reaction 3N2 + 3H2 -> 2NH3?

• 34 grams of NH3 can be produced from 28 grams of N2.

• 15 grams of NH3 can be produced from 28 grams of N2.

• 22 grams of NH3 can be produced from 28 grams of N2.

• 40 grams of NH3 can be produced from 28 grams of N2.

Calculate the mass of K2SO4 that contains 0.2 moles of K.

• 39.215 g

• 28.943 g

• 45.678 g

• 34.852 g

What is the mass of 3 moles of Na2SO4?

• 142.05 grams

• 213.07 grams

• 426.14 grams

• 284.10 grams

Determine the number of moles of AlNO₃ that are in 264 g of the compound.

• 2.97 mol

• 3.45 mol

• 2.73 mol

Tags

NGSS.HS-PS1-7

In chemistry, a "mole" is:

• The mass of an atom

• a large number used to count particles

• based on the volume of a substance

How many atoms of iodine are in a mole of iodine?

• 53

• 63.55g

• 6.02 x 10²³