A technician runs an analysis and reports that the product gas contains 0.660 mol% pentane, 5.30 mol% O2, 10.10 mol% CO2, and the balance N2 on a dry basis. Assume 100.0 mol of dry product gas as a basis of calculation. How many moles of N2 are in the dry product gas

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt