If a sample of pure silver contains 3.35 x 10^22 atoms of silver, how any moles of silver are in the sample?
17.9 mol
2.82 mol
0.180 mol
0.0556 mol

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.

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o

Find the missing probability in the table below a.0.10 b.40 c.0.80 d. 0.20