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Observe the equation presented below.

Al2O3Au+_02

To adhere to the law of conservation of mass, what set of coefficients must this equation possess, arranged from left to right?

(1 point)

2,4,3

2,1,3

1,1,3

2,4,3

5 answers

To balance the equation Al₂O₃ + Au + O₂, we first identify the reactants and products.

The equation can be represented as:

\[\text{Al}_2\text{O}_3 + \text{Au} + \text{O}_2 \rightarrow \text{products}\]

Since you asked for coefficients while maintaining the law of conservation of mass, we should balance the number of atoms for each element on both sides.

  1. From the left:

    • Aluminum (Al): 2 from Al₂O₃
    • Oxygen (O): 3 from Al₂O₃ + 2 from O₂ (which we'll need to determine)
    • Gold (Au): 1 (based on the coefficients we set)

  2. From the right:

    • We should have an equal number of each type of atom.

To balance this properly:

  • There are 2 aluminums, so we need 2 Au,
  • There are a total of 5 oxygens (3 from Al₂O₃ and 2 from O₂), which suggests we need to adjust the coefficients accordingly.

Let's denote the coefficients:

  • For Al₂O₃, let it be \(a\),
  • For Au, let it be \(b\),
  • For O₂, let it be \(c\).

The balanced equation could come to be:

2 Al₂O₃ + 4 Au + 3 O₂ → 2 Al + 4 Au + 6 O

With that:

  • Al: 2 on left and 2 on right,
  • O: 6 on the left and 6 on the right,
  • Au: 4 on the left and 4 on the right.

Thus, the coefficients from left to right necessary for balancing would be:

2, 4, 3.

Chemical equations should be balanced to illustrate the law of mass conservation. Which of the following statements concerning balanced chemical equations is accurate? (1 point)

The products must have an identical arrangement of atoms as that present in the reactants.

The products must have an identical quantity of atoms but may differ in the types of atoms compared to the reactants.

The products should possess the same quantity and variety of atoms as the reactants

The products must have an identical variety of atoms but may vary in the quantity of atoms compared to the reactants.

The accurate statement concerning balanced chemical equations is:

The products should possess the same quantity and variety of atoms as the reactants.

This reflects the law of conservation of mass, which states that mass cannot be created or destroyed in a chemical reaction. Therefore, during a chemical reaction, the number and types of atoms must remain the same before and after the reaction, though they may be rearranged into different molecules.

What distinguishes fusion from fission? (1 point)

Fusion involves the combining of small nuclei, while fission involves combining of large nuclei.

Fusion combines large nuclei, whereas fission divides small nuclei.

Fusion involves the merging of large nuclei, whereas fission involves the splitting of smaller nuclei

Fusion combines small nuclei, whereas fission breaks apart large nuclei

The correct distinction between fusion and fission is:

Fusion combines small nuclei, whereas fission breaks apart large nuclei.

In nuclear fusion, small atomic nuclei (such as hydrogen isotopes) combine to form a larger nucleus (such as helium), releasing energy. In contrast, in nuclear fission, a large nucleus (such as uranium or plutonium) splits into smaller nuclei along with the release of energy.