Which sample will have the greatest mass?

Question

BlackTom AI · Accepted Answer

The question asks which sample will have the greatest mass when each option is 1 mole.
Option 1: 1 mol of SO2. Its molar mass is about 64.07 g/mol, so the mass for 1 mole is 64.07 g.
Option 2: 1 mol of H2SO4. Its molar mass is about 98.08 g/mol, so the mass for 1 mole is 98.08 g, which is larger than the others listed.
Option 3: 1 mol of H2O. Its molar mass is about 18.02 g/mol, so the mass for 1 mole is 18.02 g.
Option 4: They all have the same mass. This would only be true if all compounds had the same molar mass, which they do not, so this statement is false.
Option 5: 1 mol of H2. Its molar mass is about 2.02 g/mol, so the mass for 1 mole is 2.02 g.
Option 6: 1 mol of O2. Its molar mass is about 32.00 g/mol, so the mass for 1 mole is 32.00 g.

To determine which has the greatest mass, compare the molar masses of each 1-mole sample. Since mass = number of moles × molar mass, and all samples are 1 mole, the sample with the largest molar mass will have the greatest mass. Among the options, H2SO4 has the largest molar mass (~98.08 g/mol), which makes 1 mol of H2SO4 the heaviest sample.

In short, Option 2 (1 mol of H2SO4) yields the greatest mass because sulfuric acid has a higher molar mass than SO2, H2O, H2, and O2, while the claim that all samples have the same mass is incorrect given the differing molar masses.

Which sample will have the greatest mass?单项选择题

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