The approximate mass percent of hydrogen in propyne 10%.
One carbon atom has mass of 12 amu (unified atomic mass). One unified atomic mass unit is approximately the mass of one nucleon (proton or neutron).
m(C) = 12 amu; mass of the carbon atom
m(H) = 1 amu; mass of the hydrogen atom
m(C₃H₄) = 3 × m(C) + 4 × m(H)
m(C₃H₄) = 3 × 12 amu + 4 × 1 amu
m(C₃H₄) = 40 amu; mass of the propyne molecule
ω(H) = 4 × m(H) ÷ m(C₃H₄) × 100%
ω(H) = 4 × 1 amu ÷ 40 amu × 100%
ω(H) = 10%; the approximate mass percent of hydrogen in propyne
More about atomic mass of an atom: brainly.com/question/12309362
#SPJ4
