Oxygen is composed of only one kind of atom and can’t be separated into simpler substances. what type of matter is it?
a. solution
b. element
c. mixture
d. compound
e. colloid

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

When electrolyzing copper (ll) chloride, what reaction takes place at the anode? what reaction takes place at the cathode?

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11