A compound consists of 81.7 percent by mass carbon and 18.3 percent by mass hydrogen What is the empirical formula of this compound?

In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town

Displacement is the slope of a velocity vs. time graph a. true b. false

How many moles are in 43.9 l of oxygen