Question

5 plant cells use water, carbon dioxide and en
and oxygen this process is called photosynthesis
co2 + h2o + energy
which chemical formula(s) represents the reactants?
how many of each atom is present in the
reactants?
c: h: o:
is this a balanced equation (yes or no)? explain w

Explanation:

Sub - question 1: Which chemical formula(s) represents the reactants?

In a chemical reaction, reactants are the substances that undergo the reaction. From the given photosynthesis - related reaction $CO_2 + H_2O+energy$, the reactants are carbon dioxide ($CO_2$) and water ($H_2O$).

Step 1: Analyze the number of C atoms

In the reactant $CO_2$, there is 1 carbon atom. There are no other reactants with carbon, so the number of C atoms is 1.

Step 2: Analyze the number of H atoms

In the reactant $H_2O$, the subscript of H is 2, so there are 2 hydrogen atoms.

Step 3: Analyze the number of O atoms

In $CO_2$, the number of O atoms is 2 (from the subscript 2 in $CO_2$), and in $H_2O$, the number of O atoms is 1. So the total number of O atoms is $2 + 1=3$.

A balanced chemical equation has an equal number of each type of atom on both the reactant and product sides. The given equation only shows the reactants ($CO_2$, $H_2O$) and energy, but not the products of photosynthesis (usually glucose $C_6H_{12}O_6$ and oxygen $O_2$). Also, even if we consider the incomplete equation as given (without products), since we don't have a complete set of products to compare the atom counts, and from the reactant side atom counts we saw (C:1, H:2, O:3), and knowing the actual products of photosynthesis, the number of atoms of each element on the reactant side is not equal to the number on the product side (if we assume the standard products). So the equation is not balanced.

Answer:

$CO_2$, $H_2O$

Sub - question 2: How many of each atom is present in the reactants?