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2 years ago

What is a renewable resources

Chemistry

2 answers:

Soloha48 [4]2 years ago

5 0

Answer: A renewable resource is a resource that can easily be replaced over a short amount of time.

Explanation: Unlike the non-renewable resources, they can be replenished.

Examples for non-renewable: coal, oil, and fossil fuels.

Examples for renewable resources: Wind, nuclear, solar power, and water.

marissa [1.9K]2 years ago

3 0

A natural resource which will replenish to replace the portion depleted by usage and consumption either through natural reproduction or other recurring processes in a finite amount of time.

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The identity of an element is defined by its number of _______________. For example, every atom of Carbon has ___ protons and on

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In this order.
protons. 6. carbon atom. different. isotopes. atomic masses. same. chemical reaction. reactions. electrons. neutrons.

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3 years ago

A sample of propane (C3H8) has a mass of 0. 47 g. The sample is burned in a bomb calorimeter that has a mass of 1. 350 kg and a

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The amount of heat released by the sample has been 22.54 kJ. Thus, option C is correct.

The specific heat has been defined as the amount of heat required to raise the temperature of 1 gram of substance by 1 degree Celsius.

The specific heat has been expressed as:

$q=mc\Delta T$

<h3 /><h3>Computation for the heat absorbed</h3>

The iron and calorimeter are in side the closed system. Thus, the energy released by the sample, has been equivalent to the energy absorbed by the calorimeter.

$q_{released}=q_{absorbed}\\
q_{released}=m_{calorimeter}\;c_{calorimeter}\;\Delta T$

The given mass of calorimeter has been, $m_{calorimeter}=1350\;\rm g$

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The change in temperature of the calorimeter has been, $\Delta T=2.87^\circ \rm C$

Substituting the values for heat released:

$q_{released}= 1350\;\text g\;\times\;5.82\;\text J/\text g^\circ \text C\;\times\;2.87^\circ \text C\\
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The amount of heat released by the sample has been 22.54 kJ. Thus, option C is correct.

Learn more about specific heat, here:

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3 years ago

Which of the following best explains why you sanded the copper wire before burning it? to create less friction between the coppe

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Answer: B

Explanation

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As copper is electropositive in nature, so electronegative ions present in the universe will try to react with copper and the copper will react easily with other elements.

So generally copper wire is coated with color or polymer coating.

In this case, the copper wire without any coating is sanded, so that the eddy sheets or polishing materials on friction with copper wire will remove the impurities by the electrostatic law of conservation of charges and charge transfer.

As the impurities are removed when copper wire is sanded, the copper atoms will be exposed on the surface of the wire leading to burning of copper in the copper wire.

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