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3 years ago

Which of these statements best describes a similarity between combustion and respiration?

2 answers:

8 0

Both respiration and combustion can produce carbon dioxide. Therefore, of the answers in your list only the third one is correct.

LenaWriter [7]3 years ago

8 0

Answer: Both release carbon dioxide into the atmosphere.

Explanation: Combustion is a process which releases carbon dioxide and water in the presence of oxygen .

For eg- Combustion of methane in presence of oxygen will lead to the release of the carbon dioxide and water.

$CH_{4} + O_{2}\rightarrow CO_{2} + H_{2}O$

Respiration is the process taking place in living organism which involves the production of the energy. It is mainly proceeded in the body through lungs with the intake of the oxygen and release of the carbon dioxide.

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What is the molarity of 2.3 mol of Kl dissolved in 0.5 L of water

Nastasia [14]

Answer:

$4.6\,\,moL\,\,L^{-1}$

Explanation:

Molarity refers to a measure of concentration.

Molarity = moles of solute/Litres of solution

Molarity refers to number of moles of solute present in this solution.

In order to find a solution's molarity, use value for the number of moles of solute and the total volume of the solution expressed in liters

As molarity of 2.3 mol of Kl is dissolved in 0.5 L of water,

Molarity = $\frac{2.3}{0.5} =4.6\,\,moL\,\,L^{-1}$

4 0

3 years ago

A molecule is broken down into its constituent atoms. Do these atoms have the same properties as the molecule?

belka [17]

When a molecule is broken down into its constituent atoms, these atoms do not have the same properties as the molecule.

We can use an everyday molecule, such as water, H20, to show this property. Water is a liquid with unique properties that stem from its hydrogen bonding. On the other hand, its constituent atoms, hydrogen and oxygen, are not liquids, and have very different properties. Oxygen and hydrogen are both gases; hydrogen is dangerous and very flammable, while we breathe in oxygen throughout our lives. This example illustrates how the atoms that make up a molecule usually have different properties than the completed molecule.

Hope this helps!

4 0

4 years ago

Thank you guys for all your help and support.

Colt1911 [192]

The answer would be 2

Hope this helps! ;)

5 0

3 years ago

( HELP) The following system is at equilibrium. In which direction (right or left) will the equilibrium position shift with the

Alex Ar [27]

a) right

b) left

c) left

d) right

e) right

f) no effect

d) left

Explanation:

We have the following chemical reaction:

3 NO (g) ⇔ N₂O (g) + NO₂ (g) + 154.9 kJ

a) right, because by lowering the temperature you remove the heat generated by the reaction, and the reaction is able to generate more heat with the reaction proceeding from left to right.

b) left, because by increasing the temperature you add heat to the reaction and by doing so the reaction from right to left will be promoted.

c) left, increasing the concentration of N₂O the equilibrium will shift to left in order to consume the N₂O added.

d) right, increasing the concentration of NO the equilibrium will shift to right in order to consume the NO added.

e) right, decreasing the concentration of N₂O the equilibrium will shift to right in order to produce the removed N₂O.

f) no effect, adding a catalyst will not shift the equilibrium position, it will only modify the time in which the equilibrium is achieved and the energy required to achieve the equilibrium state.

g) left, by increasing the volume the equilibrium will shift to the part where more moles are produced (there are 3 moles on left side while in the right side there are 2 moles).

Learn more about:

Le Chatelier Principle

brainly.com/question/4356622

brainly.com/question/3160814

#learnwithBrainly

8 0

4 years ago

At standard temperature and pressure, what is the volume of one mole of gas?

Stells [14]

Answer:

A. 22.41

Explanation: