What mass of 95% pure CaCO3 will be required to neutralise 50 mL of 0.5 M HCl solution according to the following reaction?
CaCO3(s) + 2HCl(aq) $$\to$$ CaCl2(aq) + Co2(g) + 2H2O(l)
[Calculate upto second place of decimal point]
An organic compound contains 78% (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is : [Atomic wt. of C is 12, H is 1]
Which one of the following has maximum number of atoms?
The number of protons, neutrons and electrons in 17571Lu, respectively, are :
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