According to the law of conservation of matter, which chemical equation represents a possible chemical reaction? a. c + 2h2 ch4 b. 2h2 + o2 nh3 c. 2al2o3 2na2o d. n2 + 3h2 p4o10

The answer to your question is:  A.

Explanation:

A. C  +  2H₂   ⇒  CH₄        This is the right answer because the equation is balanced and is according to the law of conservation of matter.

B. 2H₂ + O₂ ⇒ NH₃  This option is wrong because in the reactants there is oxygen and it is not in the products.

C. 2Al₂O₃ ⇒ 2Na₂O  This equation is not according to the law of conservation  of matter, in the reactants there is aluminum and it is not in the products.

D. N₂ + 3H₂  ⇒  P₄O₁₀ This equation is not according to the law of conservation of matter.

they are made of gases.

they have a spherical shape.

they make energy through fusion.