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soldi70 [24.7K]
3 years ago
11

Two brothers are skateboarding down a hill. Boy 1 has a mass of 100 kg and is moving 10 meters per second. Boy 2 has a mass of 2

00 kg and is moving at a speed of 5 m/s. Which kid has the most Kinetic Energy and why??

Chemistry
2 answers:
sukhopar [10]3 years ago
6 0
The second brother Brother because he is much heavier and therefore has more energy to be released hope this helps
nirvana33 [79]3 years ago
5 0

Answer:

Boy 1 has more kinetic energy (5000J) than boy 2 (2500J) by 2500J

Explanation:

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The Density of pure carbon in Diamond form is 3.52 g/cm^3. How many cubic inches would 23.7 moles of pure diamond occupy?
Vedmedyk [2.9K]

Answer : The volume of pure diamond is 0.493inch^3

Explanation : Given,

Density of pure carbon in diamond = 3.52g/cm^3

Moles of pure diamond = 23.7 moles

Molar mass of carbon = 12 g/mol

First we have to calculate the mass of carbon or pure diamond.

\text{ Mass of carbon}=\text{ Moles of carbon}\times \text{ Molar mass of carbon}

Molar mass of carbon = 12 g/mol

\text{ Mass of carbon}=(23.7moles)\times (12g/mole)=284.4g

Now we have to calculate the volume of carbon or pure diamond.

Formula used:

Density=\frac{Mass}{Volume}

Now putting all the given values in this formula, we get:

3.52g/cm^3=\frac{284.4g}{Volume}

Volume = 80.8cm^3

As we know that:

1cm^3=0.061inch^3

So,

Volume = 0.061\times 80.8inch^3

Volume = 0.493inch^3

Therefore, the volume of pure diamond is 0.493inch^3

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3 years ago
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Calculate the hydroxide ion consentration of a solution with pH = 3.25. show all calculations leading to your answer.
lidiya [134]
First you calculate the pOH of the solution:

pH+ pOH = 14

3.25 + pOH = 14

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<span>Concentration of [OH]</span>⁻<span> in solution:
</span>
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[ OH⁻ ]  = 10^ - 10.75

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hope this helps !


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Answer:

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Explanation:

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