Formaldehyde is a carcinogenic volatile organic compound with a permissible exposure level of 0.75 ppm. At this level, how many grams of formaldehyde are permissible in a 6.0-L breath of air having a density of 1.2 kg/m3?

Answer : The amount of formaldehyde permissible are,

Explanation : Given,

Density of air =    

First we have to calculate the mass of air.

Now we have to calculate the amount of formaldehyde.

Permissible exposure level of formaldehyde = 0.75 ppm =

Amount of formaldehyde in 7.2 g of formaldehyde =

Amount of formaldehyde in 7.2 g of formaldehyde =

Thus, the amount of formaldehyde permissible are,

the answer is d. 74.02