C(s) + 2H2(g) → CH4(g) C(s) + 2Cl2(g) → CCl4(g)

H2(g) + Cl2(g) → 2HCl(g)

its B

p. s those are the equation breakdown

the second one is
Which statement is true?
✔ The first equation must be reversed and the third equation doubled.

What substance has a mass of 9.5g and volume of 2.1cm^3

One similarity and one difference between an element and a mixture of elements

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.