he amount of NH3 in a smoggy atmosphere was measured to be 33.9 ppm. The barometric pressure was 0.9678 bar. Compute the partial pressure of NH3 in atmospheres. Enter your answer in accordance with the question statement

a) From the temperature-pressure data graphed in Part A, visually determine the gas pressure at a temperature of 350 K, including units. (b)From the temperature-pressure data graphed in Part A, determine the equation of the line of best fit. (C) What are the units for the slope of the line of best fit determined in question 2? (D) From the equation of the line of best fit determined in Question 2, algebraically determine the gas pressure at a temperature of 350 K, including units and a unit analysis. Note: I only need su part D solve please

A student experimentally determines the gas law constant, R, by reacting a small piece of magnesium with excess hydrochloric acid and then collecting the hydrogen gas over water in a eudiometer. Based L-atm on experimentally collected data, the student calculates R to equal 0.0832 mol·K L-atm Ideal gas law constant from literature: 0.08206 mol·K (a) Determine the percent error for the student's R-value. Percent error = % (b) For the statements below, identify the possible source(s) of error for this student's trial. The student notices a large air bubble in the eudiometer after collecting the hydrogen gas, but does not dislodge it. The student does not clean the zinc metal with sand paper. The student does not equilibrate the water levels within the eudiometer and the beaker at the end of the reaction. The water level in the eudiometer is 1-inch above the water level in the beaker. The student uses the barometric pressure for the lab to calculate R.

If the partial pressure of N2 is 2.95 x 105 Pa and the partial pressure of Ne is 2.50 x 105 Pa in a given mixture, what is the mole fraction of Ne (XNe)?

Please see question 28, just the top one. I figure in this system the pressure is changing and my answer is the original pressure divided by the final pressure is equal to X.  Do I have this correct?     pv= nRT      N and T and R are constants   thus P1V1 = P2V2.