3-4) A mixture of 14.0 grams of hydrogen (H2), 84.0 grams of nitrogen (N2), and 2.0…

3-4) A mixture of 14.0 grams of hydrogen (H2), 84.0 grams of
nitrogen (N2), and 2.0 moles of oxygen (O2) are placed in a flask.
When the partial pressure of the oxygen is 78.00 mm Hg, what is the
total pressure in the flask?
Please show all the calculations! All answers in 3 significant
digits (4 if the number starts with “1”)