Nitric acid has the formula HNO_3. If there are 3.61 x 10^23 atoms of N in the sample, how many moles of nitric acid are there?

What is impossible to do with a hypothesis

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?

How many moles are in 123.0 grams of kclo4?