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Sidana [21]
3 years ago
10

Which of:

Chemistry
1 answer:
shusha [124]3 years ago
4 0

Answer:

1, 2, 3

Explanation:

Using a simple chemical reaction as an example;

2H2  +  O2  --> 2H2O

1) number of atoms

In the reactant side (left side of the reaction), there are 4 Hydrogen atoms which is equal with the number of atoms in the product (right side of the reaction). In the reactant side, there are 2 oxygen atoms, same thing with the product side.  This means it is conserved.

2) Number of electrons

The number of electrons are also balanced. Although there is sharing of electrons, This means it is conserved.

3) In a chemical reaction, the law of conservation of matter is obeyed. Since the number of atoms is conserved, the mass is also conserved.

4) numbers of molecules

Although this is true for some reactions, it is not always the case as seen in the reaction above. This means it is not conserved.

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Chemistry question. Image attached.
Stells [14]

Answer:

The answer to your question is given below

Explanation:

The balanced equation for the reaction is given below:

CaO(s) + CH4(g) + 2H2O(g) <=> CaCO3(s) + 4H2(g)

1. Writing an expression for the equilibrium constant, K.

The equilibrium constant, K for a reaction is simply the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.

Thus, we can write the equilibrium constant, K for the reaction as follow:

CaO(s) + CH4(g) + 2H2O(g) <=> CaCO3(s) + 4H2(g)

K = [CaCO3] [H2]⁴ / [CaO] [CH4] [H2O]²

2. Based on the value of K, more products will be in the equilibrium mixture since the value of K is a positive large number.

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3 years ago
Your boss asks you to design a room that can be as soundproof as possible and provides you with three samples of material. The o
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sample c because it has the highest absorption

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4 years ago
Elements in what family are all gases?
Alina [70]

Answer:

Noble gases.

Good Luck & Have a good day!

(.❛ ᴗ ❛.)

6 0
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A set of aqueous solutions are prepared containing different acids at the same concentration: acetic acid, chloric acid and hydr
navik [9.2K]

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The solutions of hydrobromic acid and of chloric acid are the most electrically conductive.

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The electrical conductivity of a solution is determined by the concentration of ions in the solution. The acids listed react with water to form ions. In the case of hydrobromic acid, for example, the reaction is as follows:

HBr + H2O >> H3O(+) + Br(-)

Hydrobromic acid and chloric acid are strong acids, meaning the reaction is considered to proceed at 100%. Acetic acid, however, is a weak acid and the reaction with water does not go to completion, so there are less ionic species in the solution of acetic acid, which makes it less electrically conductive.

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