The total vapour pressure above an ideal solution of toluene and benzene is 39.7 mmHg. The vapour pressures of toluene and benzene above this mixture are 14.7mmHg and 25mmHg respectively. What is the mole fraction of toluene in the vapour phase? Show working

This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years