How many molecules of water are in a 821.3 g sample

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

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

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough