Questions in chemistry

Questions in chemistry

[Answered] After a fire, the ashes have less mass and take up less space than the trees and vegetation before the fire. How can this be explained in terms of the Law of Conservation of Mass?

[Answered] After a rock is rounded, how does weathering affect it?

[Answered] Why do the oceans play such a large part in the water cycle?

[Answered] Iron is a solid, grey metal. Oxygen is a colorless gas. When iron and oxygen chemically combine, rust is formed. Rust has a reddish-brown color. Why does rust differ from iron and oxygen?

[Answered] A water molecule gains enough energy to enter the gas phase. Is this a chemical or physical change? Why?

[Answered] How many grams are in 2.4 moles of sulfur?

[Answered] How many grams are in 11.9 moles of chromium?

[Answered] Explain why animals must eat food, but plants do not have to.

[Answered] What are three physical properties of aluminum foil?

[Answered] What kind of particles make up a compound?