Dilute Sulphric acid was added to compound of magnesium P. The solid reacted with the acid to form a colourless solution Q and a colourless gas R which formed a
white precipitate when bubbled through lime water.
a) Name
i)
Compound P
(1mk)
ii)
Solution Q
(1mk)
iii)
Colourless gas R
(1mk)

What is happening when the water inside a kettle heats up and begins to boil

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water

Sandy is building a small toy car. he wants to use a balloon to power the toy car. he fills a balloon with air and then attaches a straw to the balloon. he tapes the balloon-straw combination to the car and then releases the end of the balloon. the toy moves forward as the air from the balloon comes out the back of the straw. what can sandy do to make the toy car move faster? a) use less air in the balloon. b) blow up the balloon more. c) use a longer straw. d) use larger tires.