How would i calculate molecules of water produced in a reaction?

Becquerel expected to find ( he developed the photographic plate that had sun-exposed minerals on top of it. becquerel expected to find ( he developed the photographic plate that had been in the closed drawer.

Consider the point on the plot where 10.0 g of naoh have been added. what amount of naoh, in moles, has been added? 0.308 mol fecl3 initially present

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge