Answer:
D:Matter is not being conserved because there are 11 units in the reactants, one C8H8 and 10 O2, and 12 units in the products, eight CO2 and four H2O, so there is also more mass in the products that in the reactants.
Explanation:
searched up
Helium is stable compound. exists in gaseous state. the answer is gas
Get an equal amount of each element by adding coefficients to the different compounds.
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