Answer:
76.67 grams.
Step-by-step explanation:
To find the mass of 1.05 × 10^24 molecules of a substance, you can follow these steps:
1. Start with the given molar mass of the substance, which is 44.01 g/mol.
2. Convert the number of molecules (1.05 × 10^24) into moles by dividing by Avogadro's number (6.022 × 10^23 molecules/mol). This will give you the number of moles.
Number of moles = (1.05 × 10^24 molecules) / (6.022 × 10^23 molecules/mol)
3. Multiply the number of moles by the molar mass to get the mass.
Mass = Number of moles × Molar mass
Let's calculate it:
Number of moles = (1.05 × 10^24) / (6.022 × 10^23) ≈ 1.744
Mass = 1.744 moles × 44.01 g/mol ≈ 76.67 g
Therefore, the mass of 1.05 × 10^24 molecules of the substance is approximately 76.67 grams.