Use the chemical reaction to answer the question.
2H2+O2→2H2O
There are four atoms of hydrogen (H
) before the reaction. How many atoms of hydrogen are present after the reaction?
(1 point)
Responses
2
2
8
8
4
4
5
5 answers
The correct answer is: 4.
Which is most likely to occur during a chemical reaction?(1 point)
Responses
Mass is conserved.
Mass is conserved.
The original substance maintains its properties.
The original substance maintains its properties.
New atoms are created.
New atoms are created.
Atoms of the original substance are lost.
Responses
Mass is conserved.
Mass is conserved.
The original substance maintains its properties.
The original substance maintains its properties.
New atoms are created.
New atoms are created.
Atoms of the original substance are lost.
The correct answer is: Mass is conserved.
Why?
Mass is conserved during a chemical reaction because atoms cannot be created or destroyed. They can only rearrange to form new substances. Thus, the total mass of the reactants before the reaction should be equal to the total mass of the products after the reaction.
1 answer