4. Calculate the mass of each element: a) 3.25 mol of He
b) 0.0455 mol of Ni
c) 1.33 mol of K

step by step please

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.

The lab procedure involves several factors, listed below some were variable and some were constant. label each factor below v for variable ot c for constant

Which of the following is the best name for a compound made from calcium and bromine? (cabr2) calcium bromide calcium dibromide monocalcium dibromide calcium bromine ii