Mole Conversions

What is the significance of the molar mass in chemical reactions?

• It determines the color of the chemical reaction.

• It allows chemists to convert between grams and moles, facilitating stoichiometric calculations.

• It indicates the temperature at which a reaction occurs.

• It measures the speed of the reaction.

How many grams are in 2 moles of sodium chloride (NaCl)?

• 58.44 g

• 116.88 g

• 117.00 g

• 120.00 g

What is the mass of 1 mole of gold (Au)?

• 195.0 g

• 197.0 g

• 199.0 g

• 201.0 g

What is the molar mass of water (H2O)?

• 16.00 g/mol

• 18.016 g/mol

• 20.00 g/mol

• 15.999 g/mol

What is the molar mass of an element?

• The mass of one mole of that element, typically expressed in grams per mole (g/mol).

• The weight of an element in kilograms per mole (kg/mol).

• The total number of atoms in one mole of an element.

• The volume occupied by one mole of an element at standard temperature and pressure.

How do you calculate the number of moles from the number of atoms?

• Number of moles = Number of atoms × 6.02 × 10^23

• Number of moles = Number of atoms / 6.02 × 10^23

• Number of moles = Number of atoms + 6.02 × 10^23

• Number of moles = Number of atoms - 6.02 × 10^23

What is the molar mass of aluminum sulfate (Al2(SO4)3)?

• 340.15 g/mol

• 342.15 g/mol

• 344.15 g/mol

• 350.15 g/mol

What is Avogadro's number?

• 6.02 x 10^23

• 3.14 x 10^22

• 1.67 x 10^24

• 9.81 x 10^19

How do you convert grams to moles?

• Multiply the mass by the molar mass.

• Divide the mass by the molar mass.

• Add the mass to the molar mass.

• Subtract the molar mass from the mass.

How do you find the mass of a substance using moles?

• Mass = Number of moles × Molar mass

• Mass = Number of moles + Molar mass

• Mass = Number of moles - Molar mass

• Mass = Number of moles / Molar mass