Question

please help me.I answered them, but not sure about my answers

Since you are measuring pressure in mmHg, which numerical value of R should you us (enter the numerical value only, no units and use three significant figures)? 0.082 Question 2 1 pts Suppose you have a stoppered flask containing CO2 gas at room temperature and pressure. If the volume of your stoppered flask is 300.0 mL, the pressure in the room is 770. mm Hg, and the temperature in your work area is 22.0 C, how many moles of CO2 are in the flask? Use correct significant figures, do not include units in the answer. Record number in decimal form rather than scientific notation. 0.013 Question 3 0.5 pts How many grams of CO2 are in the flask (described in part b)? Remember to use the unrounded number of moles and wait to round your answer until the end of the problem. Use correct significant figures. Do not include units in your answer. 0.572

Answer 1

R = 0.082 el eston/molek ② = PU 170/60* 300 x 10.2 RT 0.082 X (212422) - 0.0125 0.013 moles ③ gram of we- moles x 4u = 0.03 x 44 = 0.572 gram.