• Question 01:

    What is the % by mass of beryllium chloride, BeCl2?

  • Question 02:

    What is the mass, in g, of a single atom of sulfur?

  • Questions 03-04:

    A compound is found to be 5.88 % hydrogen by mass, with the remainder of the compound being made up of oxygen.

    Question 03:

    What is the empirical formula of the compound?

  • Question 04:

    The compound has a molar mass of 34.02 g mol-1. What is its molecular formula?

  • Question 05:

    How many barium ions does one mole of barium phosphate (Ba3(PO4)2) contain?

  • Question 06:

    What is the average atomic mass of a sample of naturally occuring X, if it is comprised of the following isotopes; 47% X51, 17% X52 and 36% X56?

  • Question 07:

    What do atoms of the isotopes Cl35, and Cl37, have in common, given that the average atomic mass is 35.45 amu?

  • Question 08:

    What is always true of a pure compounds' % by mass composition?

  • Question 09:

    Which of the following types of substances must all pure substances fall into?

  • Question 10:

    Which of the following statements is true regarding various oxides of nitrogen?