0. two rectangles, a and b are in proportion in the ratio 3:5. if the area of rectangle b is 80 cm?, find the area of rectangle a? (2 marks)?
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Category: ecology | Author: Hedda Galya
0. when measuring tert-butyl alcohol for this experiment, a student first weighs an empty graduated cylinder, then pours 15 ml of the alcohol into the
0.0165g of an organic compound on analysis gave 0.0135g co2 and 0.01937g water. what is the percentage of carbon and hydrogen in the compound. ?
0.01cm3 of oil spreads out on water to form a patch of diameter 28cm. estimate the diameter of an oil molecule and express your answer correct to 3s.