Problem- A 9.80-L container holds a mixture of two gases at 17 C. The partial pressure of gas A and gas B, respectively, are 0.409 atm and 0.769 atm. If 0.120 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?
Anyone can tell me how to solve it step by step so that I will be able to understand what is going