Chemistry Past Questions and Answers

Which of the following compounds has hydrogen bonds between its molecules?

Which of the following species does not contain a co-ordinate bond?

14.8 g of a salt (z)dissolved in 250 cm<sup style='font-size: smaller;'>3</sup> of distilled water gives a concentration of 0.80 mol dm<sup style='font-size: smaller;'>-3</sup>. Calculate the molar mass of the salt (z).

How many atoms are there in one mole of hydrogen gas? [Avogadro's constant = 6.02 x 10<sup style='font-size: smaller;'>23</sup>mol<sup style='font-size: smaller;'>-1</sup>]

What is the IUPAC name of the compound represented by the molecular formula NaCIO<sub style='font-size: smaller;'>4</sub>?