A sample of a gas in an 11.2 L container is at 1.0 atm and 0°C, as shown. The mass of the sample is 16 g Which of the following is most likely to be the identity of the gas, and why? SOs, because there is 0.25 mol of gas in the container and the mass of 0.25 mol of SO, is 16 %
Oz, because there is 0.50 mol of gas in the container and the mass of 0.50 mol of O, is 16 g
CH, because there is 1.0 mol of gas in the container and the mass of 1.0 mol of CH is 16
He, because there are 4.0 mol of gas in the container and the mass of 4.0 mol of He is 16g

Based on the equation and the information in the table, what is the enthalpy of the reaction?

Cucl2 + 2nano3 cu(no3)2 + 2nacl what is the percent yield of nacl if 31.0 g of cucl2 reacts with excess nano3 to produce 21.2 g of nacl? 49.7% 58.4% 63.6% 78.7%

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.