Chemistry Past Questions and Answers

A pure solid usually melts?

At the same temperature and pressure, 50 cm<sup style='font-size: smaller;'>3</sup> of nitrogen gas contains the same number of molecules as?

8g CH<sub style='font-size: smaller;'>4</sub> occupies 11.2 dm<sup style='font-size: smaller;'>3</sup> at s.t.p. What volume would 22 g of CH<sub style='font-size: smaller;'>3</sub>CH<sub style='font-size: smaller;'>3</sub> occupy under the same condition?<br/>(C = 12, H = 1)

To what temperature must a gas 273 K be heated in order to double both its volume and pressure?

For a gas, the relative molecular mass is equal to 2Y. What is Y?