CVK 16-17 − Q & A

The mean of 40 observations is 160.Later,it was detected that the value 165 was wrong and copied as 125.Find the correct mean.

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Prove that no number added to 13 times of its reciprocal gives 7.
asked by Sai Madhan (saimadhan) 7 years ago
0

Name the compound which is reddish brown when hot and yellow when cold

A gas cylinder contains 12 x 1024 molecules of oxygen gas. [2]
If Avogadro’s number is 6 x 1023; Calculate:
(i) The mass of oxygen present in the cylinder.
(ii) The volume of oxygen at S.T.P. present in the cylinder. [O = 16]