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aleksley [76]
3 years ago
7

Lewis is making a model of the Earth-Moon system. He knows that the diameter of the Earth is about four times greater than the d

iameter of the Moon. He uses a globe that is 16 inches in diameter to represent the Earth and a balloon that is blown up to be 4 inches in diameter to represent the Moon.
What property of the Earth-Moon system is best represented by this model?
A.
the materials that make up the Earth and Moon
B.
the size of the actual Earth and Moon
C.
the appearance of the Earth and Moon
D.
the relative scale of the Earth and Moon
Chemistry
2 answers:
777dan777 [17]3 years ago
8 0

Answer:

Option (D)

Explanation:

The relative scale is used to compare two objects or models, in terms of its scale. This enables to understand the relation between the scale of one model that is directly measurable and the other that is too large to measure. Here the direct measurable model is the globe-balloon system and the non-measurable large model is the earth-moon system.

According to the provided condition, Lewis knew that the earth's diameter is four times bigger than that of the moon. He constructed a model of its own by taking a globe of diameter 16 inches and a balloon of diameter 4 inches. <u>He compares this globe to the earth and the balloon to the moon. His model completely satisfies the condition maintaining their relative sizes</u>.  

So the property of relative scale of earth and the moon system is appropriately shown in this model.

Thus, the correct answer is option (D).

Leno4ka [110]3 years ago
3 0
D. this is the correct answer because the question is showing a comparison of sizes rather than the actual sizes which eliminates B. A and C have no relevance.
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Answer:

W=5743.1077\ J

Explanation:

The expression for the work done is:

W=RT \ln \left( \dfrac{P_1}{P_2} \right)

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Applying in the equation as:

W=8.314\times 300 \ln \left( \dfrac{10}{1} \right)

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5 0
3 years ago
A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 3.30kg of water at 23.8°C. Dur
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Answer:

T_2= 31.9\°C

Explanation:

Hello there!

In this case, it is possible to propose an energy balance in order to illustrate how the heat released by the reaction is absorbed by the water:

-Q_{rxn}=Q_{water}

Thus, since the heat released by the reaction is -112 kJ (-112000 J), it is possible to define the hear absorbed by the water in terms of mass, specific heat and temperature change:

-(-112000J)=m_{water}C_{water}(T_2-T_1)

In such a way, it is possible to define the final temperature as shown below:

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4 0
3 years ago
The AE of a system that releases 12.4 J of heat and does 4.2 J of work on its surroundings It is_______ jA. 16.6 B. 12.4 C. 4.2
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ANSWER

EXPLANATION

Given that

The energy released by the system is 12.4J

Work done on the surrounding is 4.2J

Follow the steps below to find the change in energy

In the given data, energy is said to be released to the surroundings

Recall, that exothermic reaction is a type of reaction in which heat is released to the surroundings. Hence, change in enthalpy is negative

Step 1; Write the formula for calculating change in energy

\Delta E\text{ }=\text{ q }+\text{ w}

Since heat is released to the surrounding, then q = -12J

Recall, that work done by the system on the surroundings is always negative

Hence, w = -4.2J

Step 2; Substitute the given data into the formula in step 1

\begin{gathered} \text{  }\Delta E\text{ = q + w} \\ \text{  }\Delta E\text{ }=\text{ -12.4 }+\text{ \lparen-4.2\rparen} \\ \text{  }\Delta E\text{ = -12.4 - 4.2} \\ \text{  }\Delta E\text{ }=\text{ -16.6J} \end{gathered}

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Stolb23 [73]

Answer:

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Explanation:

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where,

ni are the moles of products and reactants

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