Which of the following has the smallest mass? Convert them all the grams first. O A. 4.0 x 10-6 g
O B. 4.0 x 109 ng
O C.4.0 x 10-2 micrograms
O D.4.0 x 10-3 kg
O E. 4.0 x 10-6 mg

1.solid

2.carbon dioxide

3.helium

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

the answer is d.) potassium