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denis23 [38]
3 years ago
13

Why should we try to use less oil, natural gas and electricity?

Chemistry
2 answers:
Radda [10]3 years ago
8 0
When using oil, natural gas, and electricity, and uses natural resources. Many mass production companies in factories use a lot of oil, natural gas, and electricity and it contributes to global warming negatively.
oksano4ka [1.4K]3 years ago
6 0
Because they aren’t sustainable and they contribute to global warming, I think.
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How do I answer and do this
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a) When the reaction takes place a yellow precipitate will be formed.

b) The law of conservation of mass is true.

<u>Explanation:</u>

a) When a lead nitrate solution is mixed with a potassium chromate solution, a yellow precipitate containing lead forms according to the equation:

Pb(NO_3)_2 (aq) + K_2CrO_4 (aq) → 2 KNO_3 (aq) + PbCrO_4(s).

b) Law of conservation of mass for the given reaction is true.

From the given table we know the mass of reactants and its products.

Law of conservation of mass is a principle when a reaction takes place in a closed system, the mass of the products and reactants in the system doesn't change.

⇒The sum of the mass of the reactants = The sum of the mass of the products.

The sum of the reactants = 128.71+128.97.

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The sum of the products = 154.10+103.58.

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Thus law of conservation of mass is true for the above reaction.

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A compound with an approximate molar mass of
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Colligative property definition chemistry
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Answer: Colligative properties are those properties of solutions that are dependent on the concentration of the solutes in the solution.

Colligative properties has to do with solutions, that is, solutes that are dissolved in solvents. Examples of colligative properties are: freezing point depression, vapour pressure lowering, boiling point elevation and osmotic pressure. Colligative properties do not depend on the identity of the solutes, this implies that the effect of colligative properties are uniform across all solutions. For example, the freezing point depression of any solution will depend on the concentration of solutes that are dissolve in solution.

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aksik [14]

Answer:

A. predation.

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Predation is a type of ecological interaction in which one organism which is known as predator feeds upon another organism thereby killing it. The organism which is killed by predator is known as prey. In such interaction one organism is benefited while another one is harmed.

Brown bears of Alaska feed upon salmon. In order to so they have developed many ways which include waiting at the bottom of falls from where salmons pass by or standing at the bottom of the falls.

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