The percentage purity of calcium carbonate sample whose `10g` on complete decomposition gives `4g` `CO_(2)` is
`98.2%`
`92.8%`
`95.6%`
`90.9%`

The correct percentage of CO_(2) in atmosphere is

The correct percentage of CO_(2) in atmosphere is

If the law of constant compositon is true, what weights of calcium carbon, and oxygen are present in 1.5 g of calcium carbonate, if a sample of calcium carbonate from another source contains the following percentage composition: Ca = 40.0%, C = 12.0% , and O = 48.0% ?

A reaction is 50 % complete in 2 hours and 75 % complete in 4 hours the order of reaction is

A 10 g sample of a mixture of calcium chloride and sodium chloride is treated with Na_(2)CO_(3) to precipitate calcium as calcium carbonate. This CaCO_(3) is heated to convert all the calcium to CaO and the final mass of CaO is 1.12gm. Calculate % by mass of NaCl in the original mixture.

100g of 90% pure sample of CaCO_(3) on strong heating produces how many litre of CO_(2) at NTP ?

Calculate the percentage of phosphorus in Calcium phosphate Ca_3 (PO_4)_2 .

A sample of calcium carbonate is 80% pure, 25 gm of this sample is treated with excess of HCl .How much volume of CO_(2) will be obtained from at 1 atm & 273 K ?

1 M NaOH solution was slowly added into 1000mL of 183.75g impure H_2SO_(4) solution and the following plot was obtained. The percentage purity of H_2SO_4 sample and slope of the curve respectively are : (a) 75%,-1/3 (b) 80%,-1/2 (c) 80%,-1 (d) None of these

A sample of calcium carbonate (CaCO_(3)) has the following percentage composition: Ca=40%,C=12%,O=48% If the law of constant proportions is true, then the weight off calcium in 4g of a sample of calcium carbonate from another source will be