An element forms a body-centered cubic crystalline substance. The edge length of the unit cell is 287 pm and the density of the crystal is 7.92 g/cm3. Calculate the
atomic weight of the substance.
- 45.0 amu
- 56.4 amu
- 63.5 amu
- 48.0 amu

One of the cell membrane's functions is to protect the cell keep wastes in the cell create new cells keep light out of the cell

The answer for #3 is c but i don't know why

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?