CHEMACTIVITY 6B: COUNTING BY WEIGHING, CONT.
POSSIBLE CLICKER QUESTIONS
After CTQ 5:
1. How does the mass of the products of a chemical reaction compare to the mass of the
reactants?
2. How much does 3.0 mol of CO2 weigh?
3. The atomic mass of nitrogen is 14.0 g/mol. What is the molar mass of nitrogen molecules,
N2?
4. How many moles of H atoms are there in 2 moles of sucrose (C12H22O11)?
5. What percent of the atoms in CaCl2 are Ca atoms?
29
6. About what percent of the mass in NaCl is from the Cl atoms?