In the reaction 2Ca + O2 → 2CaO for every 2 Ca you will need how much O2? a. 1 b. 2 c. 3 d. 4

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

All of the following are part of the biosphere except