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The actual weight of a molecule of water is(1) 18 gm(2) 2.99 x 10-23(3) both (1) and (2) are correct(4) None of these plz explain with soln |
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Answer» Explanation: 2) 2.99 ×10-23...the SOL. is we KNEW,n=m(mass)÷M(molar mass=18) and also n=no. given÷avogadro's no. therefore m÷M=N÷avag.no. and we knew M=1 therefore 'm' will be equal to M÷avag.no. i.e 18÷avag.no. which will be approx. equal to OPTION C. |
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