Ask a New Question
Menu

Question 13

A)
Use the reaction to answer the question.

Fe2O3+3H2SO4

How many atoms of oxygen will be found in the product(s) of the reaction?

(1 point)
Responses

4
4

12
12

15
15

3
3
Question 14
A)
Use the table and equation to answer the question

Element Atomic Mass (amu)
hydrogen 1
carbon 12
oxygen 16
CH4+2O2→ CO2+2H2O

The law of conservation of matter states that matter cannot be crated nor destroyed. How does the balance equation above demonstrate this law?

(1 point)
Responses

The number of atoms, type of elements, and mass of reactants and products are equal.
The number of atoms, type of elements, and mass of reactants and products are equal.

The number of molecules, number of atoms, and type of elements are equal.
The number of molecules, number of atoms, and type of elements are equal.

The number of molecules, number of atoms, and mass of reactants and products are equal.
The number of molecules, number of atoms, and mass of reactants and products are equal.

The number of molecules, types of elements, and mass of reactants and products are equal.

1 answer

Let's answer each question one by one.

Question 13: We need to determine how many atoms of oxygen will be found in the product(s of the reaction between Fe2O3 and H2SO4.

Since the reaction itself is not fully provided, but we can deduce what typically happens in the reaction of iron(III) oxide (Fe2O3) with sulfuric acid (H2SO4). This reaction generally produces products like iron(III) sulfate (Fe2(SO4)3) and water (H2O). Here’s the breakdown:

  1. From Fe2O3:

    • There are 3 oxygen atoms in Fe2O3.

  2. From H2SO4:

    • Each molecule of H2SO4 contains 4 oxygen atoms.
    • If you're using 3 H2SO4 (as indicated in the balanced equation typically involving Fe2O3), that would be \(3 \times 4 = 12\) oxygen atoms from H2SO4.

Thus, the total number of oxygen atoms will be:

  • From Fe2O3: 3 O atoms
  • From H2SO4: 12 O atoms
  • Total: 3 + 12 = 15 O atoms in the products.

So, the answer to Question 13 is: 15

Question 14: To show how the balanced equation (CH4 + 2O2 → CO2 + 2H2O) demonstrates the law of conservation of matter, we check the number of atoms for each type on both sides.

  1. Reactants:

    • 1 Carbon (C)
    • 4 Hydrogen (H)
    • 4 Oxygen (O - from 2 O2 molecules)

    Total:

    • C: 1
    • H: 4
    • O: 4

  2. Products:

    • 1 Carbon (C)
    • 4 Hydrogen (H - from 2H2O)
    • 4 Oxygen (O - 2 from CO2 and 2 from 2 H2O)

    Total:

    • C: 1
    • H: 4
    • O: 4

Since the number of atoms of each type in the reactants equals the number of atoms of each type in the products, it illustrates the law of conservation of matter.

The best response that reflects this is: The number of atoms, type of elements, and mass of reactants and products are equal.