One mole of any substance contains how many representative particles?
- A6.023 × 1022
- B6.023 × 1023
- C6.023 × 1024
- D6.023 × 1025
The volume occupied by one mole of any gas at STP is:
- A22.414 dm3
- B24.414 dm3
- C20.414 dm3
- D2.2414 dm3
One mole of H2O molecules is equal to:
The number of moles in 40 g of NaOH (molar mass = 40 g/mol) is:
- A0.5 mol
- B1 mol
- C2 mol
- D4 mol
At STP, 22.414 dm³ of NH3 gas is equal to:
The reactant that is completely consumed in a chemical reaction is called:
- AExcess reactant
- BLimiting reactant
- CNon-limiting reactant
- DCatalyst
The amount of product calculated from a balanced chemical equation is called:
- AActual yield
- BTheoretical yield
- CPercent yield
- DPractical yield
If the theoretical yield is 50 g and the actual yield is 40 g, the percent yield is:
Molarity is defined as the number of moles of solute dissolved per:
- A1 dm³ of solution
- B1 dm³ of solvent
- C100 cm³ of solution
- D1000 g of solution
The molar volume of a gas at STP is used to convert:
- AMass to moles
- BMoles to volume
- CVolume to mass
- DMass to volume
