THIS NEEDS TO BE BALANCED

___ CaSO4 + ___ Al(NO3)3 --> ___ Ca(NO3)2 + ___ Al2(SO4)3

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?