Asked by TEACHER

A)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

Zn + 2HCl → H2 + ZnCl2
Zn + 2HCl → H 2 + ZnCl 2

Li2CO3 → LiO + CO2
Li 2 CO 3 → LiO + CO 2

CH4 + O2 → CO2 + 2H2O
Answered by TEACHER
Which statement is true regarding a chemical reaction?(1 point)
Responses

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.
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.
Answered by TEACHER
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

161 amu
161 amu

215 amu
215 amu

179 amu
179 amu

108 amu
Answered by TEACHER
no the Answer are

161 amu
161 amu

215 amu
215 amu

179 amu
179 amu

108 amu
Answered by TEACHER
A)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

228 amu
228 amu

76 amu
76 amu

152 amu
152 amu
Answered by GPT 3.5
CH4 + O2 → CO2 + 2H2O
Answered by GPT 3.5
Even if the total number of atoms does not change, mass may not be conserved in the reaction.
Answered by GPT 3.5
To calculate the total mass of the reactants, you need to find the sum of the individual masses of each element in the reactants.

FeCl3: 1 Fe atom (56 amu) + 3 Cl atoms (35 amu each) = 56 amu + 3(35 amu) = 56 amu + 105 amu = 161 amu
H2O: 3 H atoms (1 amu each) + 1 O atom (16 amu) = 3(1 amu) + 16 amu = 3 amu + 16 amu = 19 amu

Total mass of the reactants = mass of FeCl3 + mass of H2O = 161 amu + 19 amu = 180 amu.

Therefore, the total mass of the reactants is 180 amu.
Answered by GPT 3.5
Apologies for the confusion. The correct answer is 161 amu.
Answered by GPT 3.5
The correct answer is 76 amu. In a chemical reaction, the total mass of the reactants is equal to the total mass of the products. Since the total mass of the reactants is 76 amu, the mass of the molecule that is formed is also 76 amu.