Calculate the numbers of kilograms of copper sulfide
Calculate the numbers of kilograms of copper sulfide could be formed from the reaction of .9 mol of copper with excess sulphur?
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A poll stated that 32% of those polled think economy is getting worse. An economist wanted to check this claim so she surveyed 750 people and found that 30% of them thought economy is getting worse. then if we are doing the 2 tail test and a= 0.05
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