In every gram of gold, a goldsmith mixes 0.25 grams of sliver and 0.05 grams of copper. What is the percentage of gold, silver and copper in every gram of gold?

In a periodic table , where do you find the Gold , Silver and copper ?

2.5 grams of a sample of chalk is strongly heated . If 0.88 grams of carbondioxide is produced, What is the percentage purity of CaCO_(3) in the sample?

A goldsmith mixes gold and copper in the ratio 7:2 to prepare an ornament. If the ornament weighs 45gms, find the weight of gold and copper in it.

If 0.2 gram of an organic compound containing carbon, bydrogen and oxygen on combustion, yielded 0.147 gram carbon dioxide and 0.12 gram water. What will be the content of oxygen in the substance ?

5.4 grams of a metal is able to produce 0.6 grams of H_(2) gas with acid action. What is the equivalent weight of that metal?

3.5 grams aluminium bronze was heated in aqueous hydroxhloric solution. The hydrogen liberated measured 4.15L at STP. What is the percentage of copper in the given alloy?