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Helga [31]
4 years ago
7

I will give brainiest! PLEASE ANSWER ASAP.How does the law of conservation of mass apply to this reaction: C2H4 + 3O2 → 2H2O + 2

CO2 ?
Only the oxygen needs to be balanced. There are equal numbers of hydrogen and carbon.


The equation needs to be balanced. There are fewer oxygen atoms in the equation than hydrogen or carbon.


The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.


Each element needs to be balanced.
Chemistry
1 answer:
blondinia [14]4 years ago
7 0
<h3>Answer:</h3>

The law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.

<h3>Explanation:</h3>

<u>We are given;</u>

  • The equation;

C₂H₄ + 3O₂ → 2H₂O + 2CO₂

We need to ask ourselves the following questions;

Is the equation balanced?

  • Yes, the equation because the number of atoms of each element is equal on both sides of the equation.
  • That is; Reactants: 2 carbon atoms, 4 hydrogen atoms and 6 oxygen atoms.
  • Products: 2 carbon atoms, 4 hydrogen atoms and 6 oxygen

What is the law of conservation of mass?

  • According to the law of conservation of mass, the mass of reactants should always be equal to the mass of the products in chemical reactions.

What makes the equation obey the law of conservation of mass?

  • For an equation to obey the law of conservation of mass, it must be balanced.
  • In this case, <u>the equation given is already balanced and therefore obeys the law of conservation of mass</u>.
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Explanation:

Scientist                   Evidence                                 Model

Dalton                        Gases                       indivisible, solid and spheres

J.J Thomson          Deflected beam        Negative charges evenly scattered

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Rutherford     Deflection of alpha            atomic model

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                       through the gold foil              

The emboldened words are the answer.

  • John Dalton proposed the first model of the atoms by his works on gases. He postulated the Dalton's law of partial pressure.
  • He suggested that gases are made of tiny particles called atoms.

  • J.J Thomson proposed the plum pudding model of the atom in which the charges are evenly scattered through the positively charged mass of matter.

  • The gold foil experiment by Rutherford brought the atomic model of the atoms in the front-light.
  • The model suggests a small positively charged center which the mass of the atom.
  • The outer space is occupied by the electrons.

Learn more:

Rutherford brainly.com/question/1859083

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A pure element unbound or in a diatomic state, such as cl2, always has an oxidation number of ________. a. 1 b. 2 c. magnitude e
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A pure element unbound or in a diatomic state, such as cl2, always has an oxidation number of 0 (zero).

<h3>Why does pure element or a diatomic molecule has zero oxidation state?</h3>

In a neutral substance with atoms of only one element, the oxidation number of an atom is zero. As a result, the oxidation number of the atoms in O2, O3, P4, S8, and aluminum metal is 0. The oxidation numbers for an element in its normal state will be zero. O2 and Cl2 are diatomic gas molecules that occur naturally, thus when they are in that state, they have an oxidation state of zero. Metals like zinc will also have an oxidation number of zero if they are in their natural solid state.

O2 and Cl2 are neutral diatomic, hence they will always have a zero oxidation state. It is impossible for one oxygen atom to have a negative 2 charge while the other has a positive 2. The oxidation states should be 0 if the elements are solids, liquids, or any type of diatomic molecule.

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