Question

The balanced chemical equation, C (s) + O2 (g) CO2 (g), can be expressed in words as...
1. Solid carbon plus oxygen gas yields cobalt dioxide
2.Carbon plus diatomic oxygen yields cobalt dioxide
3. Solid carbon plus oxygen gas yields carbon dioxide gas
4.
Solid calcium plus oxygen gas yields calcium dioxide gas

Answer 1

look at the molecules you have in the equation, look at the ones you have on the sentences. p.s. you can't make new elements in chemistry

Answer 2

C-carbon and the character in parenthesis is the matter phase if(s) indicates Solid and (l) indicates liquid and (g) indicate gas
now you find and chose the answer

Answer 3

Pretty easy, just look at the names of the atoms. 1 and 2 have cobalt (Co) which is not in the equation and 4 has calcium (Ca) which is not in the equation. So it must be 3