Which of these reactions is an addition reaction? A) H4C2 + Br2 -> H5C2Br + HBr

B) H4C2 + HBr -> H5C2Br

C) H5C2Cl + NaOH -> H5C2OH + NaCl

Answer is B for those with minus ;)

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

What four properties do all waves have in common

Covalent compounds: mastery test select the correct answer what is formed when atoms join together with a covalent bond? a. an ion b. a molecule c. a neutral atom d. a noble gas