Home
Class 11
CHEMISTRY
If the law of constant compositon is tru...

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%`?

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
According to the law, the samples, of calcium carbonate from the sources must be identical, i.e., their percentage composition must be the same.
Thus, the weight, `Ca, C`, and `O` in `1.5 g CaCO_(3)` are:
Calcium `(Ca) = (40 xx 1.5)/(100) = 0.60 g`
Carbon `(C ) = (12 xx 1.5)/(100) = 0.18 g,`
Oxygen `(O) = (48 xx 1.5)/(100) = 0.72 g`
Promotional Banner

Similar Questions

Explore conceptually related problems

A sample of CaCO_3 has Ca = 40%, C = 12% and O = 48%. If the law of constant proportion is true then the weight of calcium in 5 g of a sample of CaCO_3 from another source will be

Chalk contains calcium, Carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk.

A mixture of CaCl_2 and NaCl weighing 4.44g is treated with sodium carbonate solution to precipitate all the calcium ions as calcium carbonate. The calcium carbonate so obtained is heated strongly to get 0.56g of CaO. The percentage of NaCl in the mixture is [Atomic mass of Ca = 40]

A substance on analysis, gave the following percentage composition, Na = 43.4%, C = 11.3%, 0 = 45.3% calculate its empirical formula [Na = 23, C = 12, O = 16].

A mixture of CaCl_(2) and NaCl weighing 4.44 g is treated with sodium carbonate solution to precipitate all the Ca^(+2) ions as calcium carbonate The calcium carbonate so obtained is heated strongly to get 0.56 g of CaO . The percentage of NaCl in the mixture (atomic mass of Ca=40 ) is

What is the volume of CO_2 liberated (in litres) at 1 atmosphere and 0^@C when 10 g of 100% pure calcium carbonate is treated with excess dilute sulphuric acid ? (Atomic mass Ca = 40, C = 12, O = 16)

A pure sample of cobalt chloride weighting 1.30 g was found to contains 0.59 g cobalt and 0.71 g chloride on quantitative analysis. What is the percentage composition of cobalt chloride?