On complete combustion of a hydrocarbon 0.88g of carbon (iv) oxide and 0.36g of water
were formed (i) calculate the molecular formula of the hydrocarbon given that relative
molecular mass of the hydrocarbon is 70. (c = 12, O= 16)

2. you__turn left on a red light if you are in the left-most lane of a one-way street, you're turning into the left-most lane of a one-way street, and no nearby sign prohibits the turn.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o