To make unniyappam, 1 kilogram rice, 250 grams banana and 750 .grams jaggery were mixed. What is the ratio of the ingredients?

A sample of pure Ca metal weighing 1.35 grams was quantitatively converted to 1.88 grams of pure Cao. What is the atomic weight of Ca? (O = 16)

The ratio of vapour pressures of two liquids A and B in pure state are 1:2. If the two liquids are mixed and the ratio of their mole fraction in vapour phase are 2:1, the liquids A and B were mixed in the ratio of their mole: a)1 : 2 b)2 : 1 c)4 : 1 d)1 : 4

When the sides of a rectangle were measured using a string, the width was 1/4 of the string and the length 1/3 of the the string. What is the ratio of the width to the Iength?

Find the answer to each of the problems below and then write it in words and as multiplication of numbers. i) What is the total weight of two pieces, of pumpkin, each weighing 250 grams? ii) What if the weight is put in kilograms?

A rectangular cube of iron is of side 8 centimetres. What is its volume? 1 cubic centimetre of iron weighs 8 grams. What is the weight of the large cube?

One gram of metal M^(3+) was discharged by the passage of 1.81 xx 10^(23) electrons. What is the atomic weight of the metal?

250 ml of a sodium carbonate solution contains 2.65 grams of Na_(2)CO_(3) . If 10 ml of this solution is diluted to one litre,what is the concentration of the resultant solution? (mol.wt. of Na_(2)CO_(3)=106 )