Which of the following hydrocarbons contains the greatest percent by mass of carbon? Group of answer choices

C3H4 (propyne)

CH4 (methane)

C2H4 (ethene)

C2H2 (acetylene)

C₂H₂ has  the greatest percent by mass of carbon (92.3%)

Given

Hydrocarbons

Required

The greatest percent by mass of Carbon

Solution

Proust states the Comparative Law that compounds are formed from elements with the same Mass Comparison so that compounds have a constant composition of elements

% A in AxBy = (x.Ar A/MW AxBy) x 100%

C₃H₄ = 3.12/40 x 100%=90%

CH₄ = 12/16 x 100% = 75%

C₂H₄=2.12/28 x 100% = 85.7%

C₂H₂=2.12/26 x 100% = 92.3%

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.