Question
Question
In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?(1 point)
Responses
Li2CO3 → LiO + CO2
Li 2 CO 3 → LiO + CO 2
CH4 + O2 → CO2 + 2H2O
CH 4 + O 2 → CO 2 + 2H 2 O
Zn + 2HCl → H2 + ZnCl2
Zn + 2HCl → H 2 + ZnCl 2
CO2 + H2O → CH2OH + O2
In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?(1 point)
Responses
Li2CO3 → LiO + CO2
Li 2 CO 3 → LiO + CO 2
CH4 + O2 → CO2 + 2H2O
CH 4 + O 2 → CO 2 + 2H 2 O
Zn + 2HCl → H2 + ZnCl2
Zn + 2HCl → H 2 + ZnCl 2
CO2 + H2O → CH2OH + O2
Answers
GPT 3.5
CH4 + O2 → CO2 + 2H2O
Which statement is true regarding a chemical reaction?(1 point)
Responses
Even if the total number of atoms does not change, mass may not be conserved in the reaction.
Even if the total number of atoms does not change, mass may not be conserved in the reaction.
The total number of atoms changes, so mass is conserved in the reaction.
The total number of atoms changes, so mass is conserved in the reaction.
The total number of atoms does not change, so mass is conserved in the reaction.
The total number of atoms does not change, so mass is conserved in the reaction.
Even if the total number of atoms changes, mass may not be conserved in the reaction.
Responses
Even if the total number of atoms does not change, mass may not be conserved in the reaction.
Even if the total number of atoms does not change, mass may not be conserved in the reaction.
The total number of atoms changes, so mass is conserved in the reaction.
The total number of atoms changes, so mass is conserved in the reaction.
The total number of atoms does not change, so mass is conserved in the reaction.
The total number of atoms does not change, so mass is conserved in the reaction.
Even if the total number of atoms changes, mass may not be conserved in the reaction.
GPT 3.5
The total number of atoms does not change, so mass is conserved in the reaction.
Question
Use the equation and the table to answer the question.
FeCl3 + 3H2O → Fe(OH)3 + 3HCl
Element Mass of an Atom (amu)
Fe 56
Cl 35
H 1
O 16
Iron chloride and water react according to the equation shown. The table shows the atomic masses of the elements involved in the reaction. What is the total mass of the reactants?
(1 point)
Responses
179 amu
179 amu
161 amu
161 amu
108 amu
108 amu
215 amu
Use the equation and the table to answer the question.
FeCl3 + 3H2O → Fe(OH)3 + 3HCl
Element Mass of an Atom (amu)
Fe 56
Cl 35
H 1
O 16
Iron chloride and water react according to the equation shown. The table shows the atomic masses of the elements involved in the reaction. What is the total mass of the reactants?
(1 point)
Responses
179 amu
179 amu
161 amu
161 amu
108 amu
108 amu
215 amu
GPT 3.5
To find the total mass of the reactants, we need to add up the individual masses of each element in the equation.
FeCl3:
1 iron atom (Fe) with a mass of 56 amu
3 chlorine atoms (Cl) with a mass of 35 amu each
Total mass of FeCl3 = 56 amu + (3 * 35 amu) = 161 amu
H2O:
2 hydrogen atoms (H) with a mass of 1 amu each
1 oxygen atom (O) with a mass of 16 amu
Total mass of H2O = (2 * 1 amu) + 16 amu = 18 amu
Total mass of the reactants (FeCl3 + 3H2O) = 161 amu + (3 * 18 amu) = 215 amu
Therefore, the correct answer is 215 amu.
FeCl3:
1 iron atom (Fe) with a mass of 56 amu
3 chlorine atoms (Cl) with a mass of 35 amu each
Total mass of FeCl3 = 56 amu + (3 * 35 amu) = 161 amu
H2O:
2 hydrogen atoms (H) with a mass of 1 amu each
1 oxygen atom (O) with a mass of 16 amu
Total mass of H2O = (2 * 1 amu) + 16 amu = 18 amu
Total mass of the reactants (FeCl3 + 3H2O) = 161 amu + (3 * 18 amu) = 215 amu
Therefore, the correct answer is 215 amu.
In a chemical reaction, two molecules with a total mass of 76 amu react to form a single molecule. What is the mass of the molecule that is formed?(1 point)
Responses
38 amu
38 amu
152 amu
152 amu
228 amu
228 amu
76 amu
Responses
38 amu
38 amu
152 amu
152 amu
228 amu
228 amu
76 amu
GPT 3.5
In a chemical reaction, mass is conserved, meaning that the total mass of the reactants is equal to the total mass of the products.
In this case, if two molecules with a total mass of 76 amu react to form a single molecule, the mass of the molecule that is formed will also be 76 amu.
Therefore, the correct answer is 76 amu.
In this case, if two molecules with a total mass of 76 amu react to form a single molecule, the mass of the molecule that is formed will also be 76 amu.
Therefore, the correct answer is 76 amu.