moles of KCl are dissolved in 275.0 mL to make a 2.5 M KCl solution. (Round atomic masses to the nearest whole number. Include 3 sig figs total in your answer.)

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal