Question

Two moles of nitrogen gas at STP has (I) a density of 0.625 g/ L (a) only I is correc t (II) a volume of 44.8 L (b) only II is correct (III) a mass of 28 g (c) I and II are correct (d) II and III are correct (e) I, II, and III are correct

Answer 1

b. Only II is correct

Step-by-step explanation:

Remember that STP means that the temperature is 273 K and the pressure is 101.3 KPa.

Density is an intensive property, that mean that does not depend on the quantity of substance, so if you have 1 mole or 2 is the same. Density of N2 is 1.25 g/L.

The mass of 1 mole of N2 is 28 g, but in this case you have 2 moles, that means the double of grams, that is the reason, why is incorrect this option.