What is percent by mass of water in sodium bicarbonate octahydrate?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

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

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?