plz Q no 4 and 5with explain guys
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4)i,5) iv.Hope it helps you friend.
manish4444:
I said with explain
oh sorry
y sorry
not saw properly that's y
I think u don't know so
4 question (iii) option is correct option .
sorry not (iii) but (ii) is the correct option.
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4 . 500 ml of a 5M solution is diluted to 1500 ml .
if 1 litre of solution has 5 moles of solute then 0.5 litre of solution has 5/2=2.5 moles of solute . it is diluted to 1500 ml .So molarity of solution now =
2.5/1.5 =1.66 M .
5 . 4g of He and moles of Helium=4/4=1 .So it contains 6×10^23 atoms . 46 g Na contains 2 moles of Na and has 12×10^23 atoms . 0.40 gms of Ca has 0.4/40= 0.01 moles and has 6×10^21 atoms .
4. 12g He has 3 moles of Helium .(12/3 =4) It has 24×10^23 atoms . So (iv) option is the correct as it has highest number of atoms .Hope it helps you...
if 1 litre of solution has 5 moles of solute then 0.5 litre of solution has 5/2=2.5 moles of solute . it is diluted to 1500 ml .So molarity of solution now =
2.5/1.5 =1.66 M .
5 . 4g of He and moles of Helium=4/4=1 .So it contains 6×10^23 atoms . 46 g Na contains 2 moles of Na and has 12×10^23 atoms . 0.40 gms of Ca has 0.4/40= 0.01 moles and has 6×10^21 atoms .
4. 12g He has 3 moles of Helium .(12/3 =4) It has 24×10^23 atoms . So (iv) option is the correct as it has highest number of atoms .Hope it helps you...
thanks
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