Chemistry Past Questions and Answers

Which is the temperature of a given mass of a gas initially at and 9 atm, if the pressure is reduced to 3 atm at constant volume?

Which of the following will have its mass increased when heated in air?

Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)<br/>From the equation above, the mass of magnesium required to react with 250cm<sup style='font-size: smaller;'>3</sup> of 0.5M HCl is [Mg = 24]

A gaseous metallic chloride MCl<sub style='font-size: smaller;'>x</sub> consists of 20.22% of M by mass. The formula of the chloride is [M = 27, Cl = 35.5]

In which of the following are water molecules in the most disorderly arrangement?