4.00 mol of a hydrocarbon with an empirical formula of \({\text{C}}{{\text{H}}_{\text{2}}}\) has a mass of 280 g. What is the molecular formula of this compound?

A.     \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{4}}}\)

B.     \({{\text{C}}_{\text{3}}}{{\text{H}}_{\text{6}}}\)

C.     \({{\text{C}}_{\text{4}}}{{\text{H}}_{\text{8}}}\)

D.     \({{\text{C}}_{\text{5}}}{{\text{H}}_{{\text{10}}}}\)

D