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Vlad1618 [11]
3 years ago
6

Why would it be wrong to suggest that machines help us by increasing the amount of work done

Chemistry
1 answer:
lions [1.4K]3 years ago
8 0
Machine decrease the amount of work, or effort, by increasing the distance of which the effort is applied
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4 years ago
What is the molarity of a solution of 0.2 moles of Potassium Oxide
egoroff_w [7]

The molarity of a solution : 0.4 M

<h3>Further explanation</h3>

Given

0.2 moles of Potassium Oxide

500 ml of water = 0.5 L

Required

The molarity

Solution

Molarity is a way to express the concentration of the solution

Molarity shows the number of moles of solute in every 1 liter of solution or mmol in each ml of solution

\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}

Assume volume of solution = volume of water(addition of solution volume from volume Potassium Oxide is negligible

Input the value :

M = 0.2 : 0.5

M = 0.4

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3 years ago
Explain how compaction is important in the formation of coal.
olchik [2.2K]

Coal is being formed from decayed fossils and remains. These materials are smashed, "compacted" together until their chemicals merge together from the pressure of the compacting this is also how diamonds form from coal just more heat and more pressure. This process is called compaction. Without such, no coal will be present.


7 0
3 years ago
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What is meant by "elastic collisions"?
Leokris [45]

Elastic collisions meant that there will be no change in the total momentum of the system and surrounding after collision.

<u>Explanation:</u>

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The elastic collision are those which will not undergo any change in the total momentum after collision. This means that the sum of momentum of the objects before collision will be equal to the sum of momentum of the objects after collision. Thus, there will be no change in the total momentum of the object after collision in case of elastic collision.

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For an endothermic reaction at equilibrium, the addition of a catalyst
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Answer:

causes no shift

Explanation:

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