What does it mean to be in accurate measurement

Where are each of the three particles located within the atom?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

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?