JAMB - Chemistry (1998 - No. 30)
One mole of hydrocarbon contains 6g of hydrogen. If the molecular weight is 54, the hydrocarbon is an?
alkanone
alkane
alkene
alkyne
Vysvětlení
CxH6
∴ CxH6 = 54
12x + 6 = 54
12x = 54 - 6
12x = 48
x = (48)/(12)
x = 4
We have CxH6 butyne
A formular of alkyne
∴ CxH6 = 54
12x + 6 = 54
12x = 54 - 6
12x = 48
x = (48)/(12)
x = 4
We have CxH6 butyne
A formular of alkyne