Chapter 4, Problem 28P

4-44 Answer true or false.

(a) The mole is a counting unit, just as a dozen is acounting unit.

(b) Avogadro’s number is the number of formula units in one mole.

(c) Avogadro’s number, to three significant figures, is formula units per mole.

(d) 1 mol of H₂O contains formula units.

(e) 1 mol of H₂O has the same number of molecules as 1 mol of H₂O₂.

(f) The molar mass of a compound is its formula weight expressed in amu.

(g) The molar mass of H₂O is 18 g/mol.

(h) 1 mol of H₂O has the same molar mass as 1 mol of H₂O₂.

(i) 1 mol of ibuprofen, C₁₃H₁₈O₂, contains 33 mol of atoms.

(j) To convert moles to grams, multiply by Avogadro’s number.

(k) To convert grams to moles, divide by molar mass.

(l) 1 mol of H₂O contains 1 mol of hydrogen atoms and one mol of oxygen atoms.

(m) 1 mol of H₂O contains 2 g of hydrogen atoms and 1 g of oxygen atoms.

(n) 1 mole of H₂O contains 18.06 X 10 atoms.