Question

question 7
1 pts
a balanced chemical equation means that______ of atoms for each
element involved in the reaction are represented on the reactant and product
sides.
equal numbers
dissimilar numbers
multiples
unequal numbers

question 8
1 pts
____ define the identity of the substance, while____
define the stoichiometric ratios of substances.
formula subscripts, coefficients
superscripts, formula subscripts
phases, molar masses
coefficients, formula subscripts

Explanation:

Question 7

A balanced chemical equation follows the law of conservation of mass. This law states that matter is neither created nor destroyed in a chemical reaction. So, the number of atoms of each element on the reactant side must be equal to the number on the product side.

Formula subscripts indicate the number of atoms of each element in a molecule, which defines the identity of the substance. Coefficients in a chemical equation show the relative amounts (stoichiometric ratios) of substances involved in the reaction.

Answer:

A. equal numbers

Question 8