Which two of the following contain the same number of molecules? show how you arrived at your answer. 2.0g of methane, ch4 8.0g of oxygen, o2 2.0g of ozone, o3 8.0g of sulphur dioxide, so2

The same number of molecules will be if there are the same number of moles.
So, we need to find numbers of moles for these substances?

M(CH4) = 12+4=16 g/mol
2.0g*1mol/16g =1/8 mol

M(O2) = 2*16 = 32 g/mol
8.0g*1mol/32g = 1/4 mol

M(O3) = 3*16 = 48 g/mol
2.0g*1mol/48g =1/24 mol

M(SO2) = 32+2*16 = 32+32=64 g/mol
8g*1mol/64g = 1/8 mol

2.0 g CH4 and 8.0 g SO2 have the same numbers of mole, so they have the same numbers of molecules.

The size is 8inches if ur a girl

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.