A 17.4 g sample of CaSO4 is found to contain 5.12 g of Ca and 8.18 g of O. Find the mass of sulfur in a sample of CaSO4 with a mass of 40.3 g.

Which characteristics can be used to differentiate star systems? check all that apply.

Ablock of aluminum is dropped into a graduated cylinder with an initial volume of water at 75ml and the volumes rises to 90ml. if the block has a mass of 40.5 g what is its density ?

0.88 moles of n2o5 (g) was placed in a sealed 1.00 l vessel. calculate the equilibrium concentration of n2o5. no2, and o2 and the equilibrium constant after equilibrium has been reached by 65.0% of the n2o5 decomposing.