Using the data from the chart above, what is a valid conclusion about HIV? A =The lifespan of someone with HIV is 6 years after infections.

B =Within 3 years, the number of helper T-cells can reduce by half

C =HIV infection results in constant increase of helper T cells

D =After 4.5 years, HIV goes away​

73.5 kJ

Step-by-step explanation:

Mass of butane = 185 g

Heat of vaporization for butane = 23.1 kJ/mol

Molar mass of butane = 58.12 g/mol

Number of moles of butane =

Energy required for burning 185 g of butane = 3.18×23.1 = 73.5 kJ

∴ Energy is required to vaporize 185 g of butane at its boiling point is 73.5 kJ