What are the percent compositions of C and H in C2H2? ( Molar mass of C = 12.01g/mol and mass of H is 1.01g/mol)

a
C= 92.24% and H = 7.76%
b
C= 29.55% and H= 70.45%
c
C= 7.76% and H = 92.24%
d
C= 70.45% and H = 29.55%

Pinene is an unsaturated hydrocarbon found in pine resin. if pinene has m+ = 136 and contains 1 double bond(s) and 2 ring(s); what is its molecular formula? enter the formula in the form ch first, then all other atoms in alphabetical order; do not use subscripts. the formula is case-sensitive