Hor Weng Wai
New member
1. A sample of M gram of an organic compound is vapourised in a gas syringe and occupies V cm3 at T Kelvin and P atm. What is the relative molecular mass of the compound? (MR - molecular mass)
A. MR = (M)(22400)(T) / (P)(V)(273)
B. MR = (M)(22400)(T+273) / (P)(V)(273)
C. MR = (M)(22400)(273)(P) / (V)(T)
D. MR = (M)(22400)(273)(P) / (V)(T+273)
2. Chlorine gas in a severe irritant to the eyes and respiratory system. The maximum safe toleration level of the chroline gas in air is 0.005 mg/dm3.
How many molecules of the chlorine gas are present in 1dm3 of air at this toleration level?
A. (0.005)(71) / (6 x 10*23)
B. (0.005)(6 x 10*23) / (71)
C. (0.005)(6 x 10*23) / (1000)(71)
D. (0.005)(71)(6 x 10*23) / (1000)
A. MR = (M)(22400)(T) / (P)(V)(273)
B. MR = (M)(22400)(T+273) / (P)(V)(273)
C. MR = (M)(22400)(273)(P) / (V)(T)
D. MR = (M)(22400)(273)(P) / (V)(T+273)
2. Chlorine gas in a severe irritant to the eyes and respiratory system. The maximum safe toleration level of the chroline gas in air is 0.005 mg/dm3.
How many molecules of the chlorine gas are present in 1dm3 of air at this toleration level?
A. (0.005)(71) / (6 x 10*23)
B. (0.005)(6 x 10*23) / (71)
C. (0.005)(6 x 10*23) / (1000)(71)
D. (0.005)(71)(6 x 10*23) / (1000)