Question

A 5 liter vessel contains 2g of hydrogen and 28g of nitrogen at 27 temperature.find to total mixture ?

Answer 1

Your question isn't clear as to what you want. The total mixture in grams is 28 + 2 = 30g but I doubt that is what you want. Whatever you want; however, I expect you can get it with PV = nRT

Answer 2

What is the pH of pure water at 70C