Need Help with question 4,5 and 6

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Which of the following is one of the assumptions of the ideal gas law? At the same temperature, heavy gas particles are assumed to have a higher kinetic energy than light gas particles. The gas particles are assumed to have no attractions to each other. Different types of gases are assumed to repel each other, creating heterogeneous mixtures. The gas particles themselves are assumed to have a large volume relative to the size of the container. Question 5 ( 0.5 points) You have a sample of a gas mixture which contains 3.5 moles of helium and 4.5 moles of neon. If the pressure of the helium is 340 torr, what is the total pressure in the container? 149 torr 437 torr 777 torr 1190 torr Question 6 (0.5 points) A student measures the concentration of a solution 4 times, and gets the following results: 2.14M,2.09M,2.13M,2.11M If the true value of the concentration is 1.66M, what can we say about possible sources of error in the experiment? Some source of systematic error is making the results inaccurate. Some source of random error is making the results inaccurate. We cannot select between random and systematic errors without knowing the procedure used to measure the concentration. The results are not inaccurate - when the experimental and true values are rounded to one significant figure, they are in agreement