I believe I know the answer to #4
ANSWER: Two moles to a first approximation
*Disclaimer* I'm pretty sure I'm right, but I could be wrong
Answer: Yes
Explanation: Silicon is never found as a free element naturally, meaning it always occurs with other elements.
I suppose it false, since the oxidation involves the loss or removal of the electrons such forth it does not gain electrons.
Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
I hope this helps you understand! <3
You would have to show me the answers