`g` এ একটি `.^(12)C` পরমাণুর ভর কত হবে?...

What will be the mass of one .^(12)C atom in g ?

84.12g "of gold at" 120.1^(@)C . Is placed in 106.4g of H_(2)O g at 21.4^(@)C . What is the final temperature of this system?

Evaluate: (i) .^(12)C_(1)+.^(12)C_(2)+.^(12)C_(3)+ . . .+.^(12)C_(12) (ii) .^(19)C_(3)+.^(19)C_(5)+.^(19)C_(7)+ . . .+^(19)C_(19) .

5 g of a substance when dissolved in 50 g water lowers the freeezing by 1.2^(@)C . Calculate molecular wt. of the substance if molal depression constant of water is 1.86^(@)C K kg mole^(-1) .

By dissolving 5 g substance in 50 g of water, the decrease in freezing point is 1.2^(@)C . The gram molal depression is 1.85^(@)C . The molecular weight of substance is