Converting Grams to Moles and the Avogadro Constant (Leaving Cert Chemistry): Quizzes

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Converting Grams to Moles and the Avogadro Constant
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What does the mole concept bridge in chemistry?

Microscopic & macroscopic worlds

What formula calculates number of moles from mass?

MassRMM\frac{\text{Mass}}{\text{RMM}}

How is relative molecular mass (RMM) calculated?

Adding atomic masses of all atoms

How many moles are in 12.25 g of H2SO4\text{H}_2\text{SO}_4 (RMM = 98.086 g/mol)?

0.125 moles

What is Avogadro's constant?

6.02×10236.02 \times 10^{23}

What formula converts moles to number of particles?

Moles×6.02×1023\text{Moles} \times 6.02 \times 10^{23}

How many atoms are in 0.25 moles of sodium?

1.505×10231.505 \times 10^{23} atoms

What is step 1 when converting grams directly to particles?

Convert grams to moles

What formula converts particles back to moles?

Particles6.02×1023\frac{\text{Particles}}{6.02 \times 10^{23}}

What formula calculates mass from moles?

Moles×RMM\text{Moles} \times \text{RMM}

Which application uses mole conversion skills?

Calculating reactant quantities

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