1.9 moles of gas are in a flask at 21°C as well as 697 mmHg. Explain the flask was opened and 10.5g of gas X was added to the flask. If the pressure changed to 795 mmHg and the temperature of the mixture was 26°C in the flask.
(a) Explain how many moles of gas total are in the flask after the addition of gas X?
(b) Explain how many moles of gas X were added to the flask?
(c) Explain what the identity of gas X is O2, Cl2 or NO2?