Question

bellringer
find the molar mass (mass of 1 mole) of the following atoms/compounds:
al (aluminum)
caso₃
c₁₂h₂₂o₁₁

Explanation:

Step1: Find molar mass of Al

Molar mass of Al (from periodic table) is $26.98\ \text{g/mol}$.

Step2: Find molar mass of $CaSO_{3}$

• Molar mass of Ca: $40.08\ \text{g/mol}$
• Molar mass of S: $32.07\ \text{g/mol}$
• Molar mass of O: $16.00\ \text{g/mol}$
• $CaSO_{3}$ has 1 Ca, 1 S, and 3 O.
• Molar mass = $40.08 + 32.07+(3\times16.00)=40.08 + 32.07+48.00 = 120.15\ \text{g/mol}$

Step3: Find molar mass of $C_{12}H_{22}O_{11}$

• Molar mass of C: $12.01\ \text{g/mol}$
• Molar mass of H: $1.008\ \text{g/mol}$
• Molar mass of O: $16.00\ \text{g/mol}$
• $C_{12}H_{22}O_{11}$ has 12 C, 22 H, and 11 O.
• Molar mass = $(12\times12.01)+(22\times1.008)+(11\times16.00)$

$=144.12 + 22.176+176.00 = 342.296\ \text{g/mol}$

Answer:

• Al: $26.98\ \text{g/mol}$
• $CaSO_{3}$: $120.15\ \text{g/mol}$
• $C_{12}H_{22}O_{11}$: $342.296\ \text{g/mol}$