Question

question 3
1 pts
substances undergoing reaction are called
while the substances
produced in the reaction are called
reactants, products
factors, results
compounds, components
substrates, starting materials
question 4
1 pts
the relative numbers of reactant and product species are represented
by
prefixes
coefficients
superscripts
subscripts

Explanation:

• For Question 3: In a chemical reaction, the substances that start the reaction (undergo reaction) are defined as reactants, and the substances formed as a result of the reaction are called products.
• For Question 4: In a chemical equation, coefficients are used to represent the relative numbers of reactant and product species. For example, in the equation \(2H_2 + O_2

ightarrow2H_2O\), the numbers \(2\), \(1\) (implied for \(O_2\) if not written) and \(2\) are coefficients that show the ratio of reactants (\(H_2\) and \(O_2\)) and product (\(H_2O\)).

Answer:

Question 3: reactants, products
Question 4: coefficients