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Calcium carbonate reacts with aqueous to give according to the reaction, . The mass of required to react completely with of is
of a hydrocarbon requires of for complete combustion. Calculate value of?
How many gms of copper would be displaced from the copper sulphate solution by adding 27 gm of aluminium
10 moles and of were allowed to react over a suitable catalyst. 10 moles of were formed. The remaining moles of and respectively are:
The density of a sulphuric acid solution that is (molar mass ) by mass will be:
One mole of potassium chlorate is thermally decomposed and excess of aluminium is burnt in the gaseous product. How many mole of aluminium oxide are formed:
If NA is Avogadro’s number, then the number of valence electrons in 4.2 g of nitride ion () is (Given One atom of N has 5 valence electrons)
The molecular mass of \(\mathrm{CO_2}\) is 44 amu and Avogadro’s number is 6.02 × 1023. Therefore, the mass of one molecule of \(\mathrm{CO_2}\) is:
\(\mathrm{H_2S}\) contains 5.88% hydrogen, \(\mathrm{H_2O}\) contains 11.11% hydrogen while \(\mathrm{SO_2}\) contains 50% sulphur. These figures illustrate the law of:
Potassium combines with two isotopes of chlorine (35Cl and 37Cl) respectively to form two samples of KCl. Their formation follows the law of: