What does the Law of Conservation of Mass say about a chemical reaction?(1 point)
Responses
Mass is not measurable in a chemical reaction.
Mass increases as atoms are rearranged during a chemical reaction.
To balance a chemical equation, additional mass may be created.
In a chemical reaction, mass is neither created nor destroyed.
In a chemical reaction, mass is neither created nor destroyed.
Which of the following molecules shows two atoms of hydrogen (H)?(1 point)
Responses
2H2O
2 cap h sub 2 cap o
H2SO4
cap h sub 2 cap s cap o sub 4
2CH4
2 cap c cap h sub 4
HO2
cap h cap o sub 2
H2SO4
From the Periodic table, it can be determined that iron (Fe) has an atomic mass of 56 amu, oxygen (O) has an atomic mass of 16 amu, and hydrogen (H) has a mass of 1 amu. What would the atomic mass of Fe(OH)3
be?(1 point)
Responses
107 amu
107 amu
73 amu
73 amu
75 amu
75 amu
219 amu
The atomic mass of Fe(OH)3 would be 107 amu.
The Law of Conservation of Mass states that in a chemical reaction, mass is neither created nor destroyed.
The correct answer is: In a chemical reaction, mass is neither created nor destroyed.
The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction. This means that the total mass of the substances present before the reaction is equal to the total mass of the substances after the reaction. The atoms in the reactants are rearranged to form new products, but the total number of atoms remains the same. Therefore, the mass is conserved and does not change. To understand the Law of Conservation of Mass in a chemical reaction, you need to observe and measure the mass of the substances involved before and after the reaction takes place.