Ce - 141; 3.2mu * C * i after 130 The half - life for the radioactive decay of is 32.5 days . If a sample has an activity of d have elapsed , what was the initial activity , in microcuries , of the sample ?

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

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How does the viscosity of magma change as magma cools?