A sample of a gas weighs 2.70 g and has a volume of 816.0 mL at 635.0 torr and 22.0 °C. What is its molar mass?

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering