What weight of calcium oxide will be formed on heating 19.3 g of calcium carbonate ?
(At. wt : Ca = 40, C=12, O = 16)

20.2 g of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (At wt Mg=24 )

What mass of CaO will be obtained by heating 3 mole of CaCO_(3) ? [Atomic mass of Ca=40 ]

A water soluble compound 'A' having molecular formula C_3H_6O gives yellow crystalline solid on heating with iodine and sodium carbonate. The compound 'A' is

When the solution of sodium carbonate is added to the solution of calcium chloride, a precipitate is formed. a. What is the colour of the precipitate formed? b. Name the precipitate. c. What is the type of the chemical reaction?

Apparatus: Two test tubes, bent tube, rubber cork, burner, etc. Chemicals: Calcium carbonate, freshly prepared lime water. Procedure: Take some calcium carbonate in a test tube. Fit a bent tube to this test tube with the help of a rubber cork. Insert the other end of the bent tube in the freshly prepared lime water taken in the other test tube. Heat the powdered calcium carbonate in the first test tube strongly. What will you observe?

Carbohydrates are compounds containing only carbon, hydrogen and oxygen. When heated in the absence of air, these compounds decompose to form carbon and water. If 310 g of a carbohydrate leave a residue of 124 g of carbon on heating in absence of air, what is the empirical formula of the carbohydrate?

A substance, on analysis, gave the following percent composition: Na = 43.4%, C = 11.3 % and O = 45.3 %. Calculate the empirical formula. (At. mass Na = 23 u, C = 12 u, O = 16 u).