Butane - ethane - methane - propane: what do these hydrocarbons have in common?

Both have in common that they are alkanes.

Explanation:

hey represent hydrocarbons, that is to say organic compounds that contain atoms of Carbon and Hydrogen. The termination (suffix) -ano refers to alkanes.

Methane: has a carbon atom, Ethane: 2, Propane: 3 and Butane: 4.

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally