Define the mole.

The mole is the amount of matter equivalent to what is contained in an Avogadro number of carbon-12 atoms.

What conversion factor is needed to convert the number of neodymium atoms to the amount of neodymium atoms (in moles)?

To convert the number of neodymium atoms to the amount of neodymium atoms (in moles) one needs to multiply by 1 mole Nd atoms/6.022x10^{23} Nd atoms.

What conversion factor is needed to convert the amount of chlorine molecules (Cl_{2}) in moles to the number of chlorine molecules?

To convert the amount of chlorine molecules (Cl_{2}) in moles to the number of chlorine molecules one needs to multiply by 6.022x10^{23} Cl_{2} molecules/1 mole Cl_{2} molecules.

What conversion factor is needed to convert the amount of chlorine molecules (Cl_{2}) in moles to the number of chlorine atoms?

To convert the amount of chlorine molecules (Cl_{2}) in moles to the number of chlorine atoms one needs to multiply by 6.022x10^{23} Cl_{2} molecules/1 mole Cl_{2} molecules x 2 Cl atoms/ 1 Cl_{2} molecule.

Which molecule has a greater molar mass: H_{2}O or H_{2}O_{2}?

H_{2}O_{2} clearly has a greater molar mass as its molecular formula has one additional oxygen atoms per molecule.

Which has a greater amount of molecules in moles: one gram of H_{2}O or one gram of H_{2}O_{2}?

One gram of H_{2}O has a greater amount of molecules. This is because the amount is calculated by dividing the mass by the molar mass. Because the molar mass of H_{2}O is smaller, one gram will correspond to a greater amount (in moles). This can also be shown by calculation 1 g/18.02 g/mol = 0.055 mol vs 1 g/34.02 g/mol = 0.029 mol.

Which has a greater number of molecules: one gram of H_{2}O or one gram of H_{2}O_{2}?

One gram of H_{2}O has a greater number of molecules. This is because the number of molecules is calculated by dividing the mass by the molar mass and then multiplying by Avogadro's number. Because the molar mass of H_{2}O is smaller, one gram will correspond to a greater amount.

Which has more oxygen atoms: one gram of H_{2}O or one gram of H_{2}O_{2}?

H_{2}O_{2} has more oxygen atoms. Although there is a greater amount of H_{2}O (1 g/18.02 g/mol = 0.055 mol vs 1 g/34.02 g/mol = 0.029 mol) than H_{2}O_{2}, there are 2 mol of oxygen atoms for every 1 mol of H_{2}O_{2} molecules, therefore a total 0.059 mol of oxygen atoms. For water, because there are 1 mol of oxygen atoms for every 1 mol of H_{2}O molecules, there are 0.055 mol of oxygen atoms.

Which has more hydrogen atoms: one gram of H_{2}O or one gram of H_{2}O_{2}?

H_{2}O has more hydrogen atoms. There is a greater amount of H_{2}O molecules than H_{2}O_{2} molecules for one gram of each coompound (1 g/18.02 g/mol = 0.055 mol vs 1 g/34.02 g/mol = 0.029 mol) and given that both compounds have 2 mol of hydrogen atoms per 1 mol of compound, H_{2}O has more hydrogen atoms.

Which molecule has a greater molar mass: N_{2}O or N_{2}O_{4}?

N_{2}O_{4} clearly has a greater molar mass as its molecular formula has three additional oxygen atoms per molecule.

Which has a greater amount of molecules in moles: one gram of N_{2}O or one gram of N_{2}O_{4}?

One gram of N_{2}O has a greater amount of molecules. This is because the amount is calculated by dividing the mass by the molar mass. Because the molar mass of N_{2}O is smaller, one gram will correspond to a greater amount (in moles).

Which has a greater number of molecules: one gram of N_{2}O or one gram of N_{2}O_{4}?

One gram of N_{2}O has a greater number of molecules. This is because the number of molecules is calculated by dividing the mass by the molar mass and then multiplying by Avogadro's number. Because the molar mass of N_{2}O is smaller, one gram will correspond to a greater amount.

Which has more oxygen atoms: one gram of N_{2}O or one gram of N_{2}O_{4}?

N_{2}O_{4} has more oxygen atoms. Although there is a greater amount of N2O (1 g/44.01 g/mol = 0.023 mol vs 1 g/92.01 g/mol = 0.011 mol) than N_{2}O_{4}, there are 4 mol of oxygen atoms for every 1 mol of N_{2}O_{4} molecules, therefore a total 0.044 mol of oxygen atoms. For N_{2}O, because there are 1 mol of oxygen atoms for every 1 mol of N_{2}O molecules, there are 0.023 mol of oxygen atoms.

Which has more nitrogen atoms: one gram of N_{2}O or one gram of N_{2}O_{4}?

N_{2}O has more nitrogen atoms. There is a greater amount of N_{2}O molecules than N_{2}O_{4} molecules for one gram of each coompound (1 g/44.01 g/mol = 0.023 mol vs 1 g/92.01 g/mol = 0.011 mol) and given that both compounds have 2 mol of nitrogen atoms per 1 mol of compound, N_{2}O has more nitrogen atoms.

What conversion factor(s) is(are) needed to convert number of acetone (C_{3}H_{6}O) molecules to mass of acetone in grams?

To convert number of acetone (C_{3}H_{6}O) molecules to mass of acetone in grams one needs to multiply by 1mol/6.022x10^{23} C_{3}H_{6}O molecles x 58.08 g/mol (molar mass of acetone).

What conversion factor(s) is(are) needed to convert number of acetone (C_{3}H_{6}O) molecules to number of hydrogen atoms?

To convert number of acetone (C_{3}H_{6}O) molecules to number of hydrogen atoms one needs to multiply by 6 H atoms /1 molecule C_{3}H_{6}O.

What conversion factor(s) is(are) needed to convert amount of acetone (C_{3}H_{6}O) molecules (in moles) to amount of hydrogen atoms (in moles)?

To convert amount of acetone (C_{3}H_{6}O) molecules (in moles) to amount of hydrogen atoms (in moles) one needs to multiply by 6 mol H atoms /1 mol C_{3}H_{6}O molecules.

Amount of matter equivalent to what is contained in an Avogadro number of carbon-12 atoms.

The mole