Calculations quiz

1. State the particles that are found within the nucleus of an atom

2. What is meant by the term molecular formula?

3. What is the relative atomic mass (Aᵣ) of a silicon atom?

4. How many electrons in a sodium atom?

5. To determine the formula of a metal oxide by combustion, magnesium is heated in a crucible. Why is the crucible is cooled, weighed, reheated, cooled, re-weighed, and so on?

6. What is the empirical formula of an alcohol with the analysis; 52.2% C, 13.0% H and 34.8% O?

7. Calculate the relative formula mass(Mr) of carbon dioxide (CO₂)

8. A sample of carbon contained 98.90% carbon-12 and 1.10% carbon-13. Calculate the relative atomic mass of carbon

9. A compound that contained 24.24% Carbon. 4.04% Hydrogen and 71.72% Chlorine and has a relative molecular mass of 99. Calculate the empirical formula and the molecular formula.