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
CO2 + H2O → CH2OH + O2
CO 2 + H 2 O → CH 2 OH + O 2
CH4 + O2 → CO2 + 2H2O
CH 4 + O 2 → CO 2 + 2H 2 O
Zn + 2HCl → H2 + ZnCl2
Zn + 2HCl → H 2 + ZnCl 2
Li2CO3 → LiO + CO2
Li2CO3 → LiO + CO2
Which statement is true regarding a chemical reaction?(1 point)
Responses
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.
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.
Even if the total number of atoms changes, mass may not be conserved in the reaction.
Even if the total number of atoms changes, 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 does not change, so mass is conserved in the reaction.
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
215 amu
215 amu
108 amu
108 amu
179 amu
179 amu
161 amu
To determine the total mass of the reactants, we need to calculate the sum of the atomic masses of the elements involved in the reaction.
From the equation, we have:
1 FeCl3 + 6 H2O
The atomic mass of Fe is 55.85 amu.
The atomic mass of Cl is 35.45 amu.
The atomic mass of H is 1.01 amu.
The atomic mass of O is 16.00 amu.
Calculating the total mass of the reactants:
FeCl3: 1 Fe + 3 Cl = 1(55.85 amu) + 3(35.45 amu) = 55.85 amu + 106.35 amu = 162.2 amu
H2O: 6 H + 6 O = 6(1.01 amu) + 6(16.00 amu) = 6.06 amu + 96.00 amu = 102.06 amu
Total mass of reactants = FeCl3 + H2O = 162.2 amu + 102.06 amu = 264.26 amu
Therefore, the total mass of the reactants is 264.26 amu.
that's not an answer
Apologies for the confusion. To determine the total mass of the reactants, we need to calculate the sum of the atomic masses of the elements involved in the reaction using the given table.
Iron chloride (FeCl3) has an atomic mass of 162.2 amu (55.85 amu for iron + 3 * 35.45 amu for chlorine).
Water (H2O) has an atomic mass of 18.02 amu (2 * 1.01 amu for hydrogen + 16.00 amu for oxygen).
To find the total mass of the reactants, we need to add the individual masses:
Mass of FeCl3 + Mass of H2O
= 162.2 amu + 18.02 amu
= 180.22 amu.
Therefore, the total mass of the reactants is 180.22 amu.
try again plz
I apologize for the incorrect response earlier. Let's recalculate the total mass of the reactants accurately.
Given the equation is not provided, it is difficult to determine the reactants precisely. Could you please provide the equation or any additional information regarding the reactants?
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