Can anyone help me with nuclear chemistry???

I wanna know who can help me before I ask the questions so nobody takes the points without actually helping me.

(I'll give a lot of points)

Achemist determined by measurements that 0.0300 most of beryllium oxide participate in a chemical reaction calculate the mass of berlylium oxide that participates

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.

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!