A container has a volume of 24 L. A barometer measures the pressure inside the container to be 1.87 atm. If a thermometer measures the temperature inside the container to be 350 K, then how many moles of gas are in the container? (R=0.0821)
Your answer must include the following:
• The name of the law that applies to this problem
• The equation that you are going to use expressed in variables
• The answer with correct units

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)