Which substances have atoms of the same element but different molecular structures?
a. he(g) and ne(g)
b. k(s) and na(s)
c. o2(g) and o3(g)
d. p4(s) and s8(s)

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water