If 200cm³ of a gas at s.t.p. has a mass of 0.268g. What is its molar mass? (Molar volume of a gas at s.t.p. = 22.4 dm³) by Sunday | Aug 25 | Chemistry WAEC | 0 comments A. 300g B. 200g C. 150g D. 30g E. 15g Correct Answer: Option D – 30g Users Also Read These:200cm³ of 0.50mol/dm³ solution of calcium hydrogen…Calculate the mass of chlorine gas which occupies a…The volume of 2.5 moles of oxygen at s.t.p is?…Calculate the mass of chlorine gas which occupies a…A given amount of gas occupies 10.0dm³ at 4atm and…