Please help this is 8th grade science and it’s a quiz not just some notes it’s really important ty!

The volume of a sphere is given by v= (4/3) pi r cubed, where r is the radius. compute the volume of a sphere with a radius of 117pm. state your answer in units of cubed.

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?