Determine the mass percent of original sample
Determine the mass percent of CuCl2 *2H2O in the original sample? A 2.634 g sample of impure CuCl2 * 2H2O was heated to drive off the water of hydration. The mass after heating was 2.125 g.
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In the random samples of 12 from each and every two normal populations, we found the following statistics: (X1)=74,(X2)=71,S1=18,S2=16. Test with ?=.05 to find whether we can infer that the population means differ.
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