Which of the following is not the use of CaO? a. use in whitewash

b. manufacture of sodium carbonate

c. purification of sugar

d. manufacture of dyestuffs​

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

When balancing a chemical equation:

Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green