The molecular weight of cacl2  is 110.98 g/mol. in order to make up 500. ml of a 0.500 m solution, you need

The rock in a lead ore deposit contains 89 % pbs by mass. how many kilograms of the rock must be processed to obtain 1.5 kg of pb?

What type of matter is made of only one kind of atom

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n