Recent content by Lars Bos

Oh yes. So 4 ppm in 185 m3 equals to 0.74 liters. What is the next step?

In 1,000,000 liters 4 ppm means 4 L. In 1,000 m3 4 ppm means 0.004 L. In 100 m3 4 ppm means 0.0004 L. In 185 m3 4 ppm means 0.00074 L? And now?

I understand that you are trying to help me out here and I appreciate it. What I don't get is how to change the 185 m3 into ppm and then calculate how much 4 ppm amounts to.

Are you trying to imply that since 185 m3 equals to 185,000 liters, the 4 ppm of NO2 amounts to 21.6 liters?

The amount is not given. All the given values are mentioned in the question. I know this is quite tricky one.

They require a solution of 50 ppm NO2 with some unreactive gas in the cylinder.

No, there is no chemical/equilibrium reaction involved.

That is 1 liter.

That is 10/1,000,000 = 0.00001 or 10 ppm Btw the original question is in v/v.

What do you mean by v/v or w/w ppm? Sorry, your question is not clear enough.

Molar mass of NO2 is 46 g/mol. Does that mean we need 1/1,000,000th of the above?

Homework Statement A 185 m3 room must be filled with 4 ppm NO2 gas (Nitrogen dioxide). The gas comes in cylinder of 200 bar and 50 liters (20x50 = 10,000 liters) and 50 ppm. How many cylinders are needed? Homework Equations 1 ppm = 1/1,000,000 (parts per million) (can't think of more...