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babunello [35]
3 years ago
7

What two things do you need to determine speed

Chemistry
2 answers:
prisoha [69]3 years ago
7 0
To calculate speed, you must measure two quantities: the distance traveled and the time it took to travel that distance.
zloy xaker [14]3 years ago
3 0

the distance traveled and the time it took to travel that distance

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What is the kinetic energy, in joules, of a molecule of carbon tetrachloride moving at a speed of 255 m s–1 (use the appropriate
hram777 [196]

Answer:

The kinetic energy of a molecule of carbon tetrachloride is 8.29 zJ.

       

Explanation:

The kinetic energy of a molecule of carbon tetrachloride is given by:

K = \frac{1}{2}mv^{2}

Where:

m: is the mass

v: is the speed = 255 m/s                            

To find the mass we need to find the molar mass for CCl₄, and use the Avogadro's number, knowing that in 1 mol of carbon tetrachloride we have 6.022x10²³ molecules:

A (C) = 12.011 g/mol

A (Cl) = 35.45 g/mol

The molar mass (M) of CCl₄ is:

M = A (C) + 4*A (Cl) = 12.011 g/mol + 4*35.45 g/mol = 153.81 g/mol

Now, the mass of 1 molecule of CCl₄ is:

m = 153.81 \frac{g}{mol}*\frac{1 mol}{6.022 \cdot 10^{23} molecules} = 2.55 \cdot 10^{-22} g = 2.55 \cdot 10^{-25} kg

Finally, the kinetic energy of a molecule of carbon tetrachloride is:

K = \frac{1}{2}mv^{2} = \frac{1}{2}2.55 \cdot 10^{-25} kg*(255 m/s)^{2} = 8.29 zJ

Therefore, the kinetic energy of a molecule of carbon tetrachloride is 8.29 zeptoJoule.

I hope it helps you!

6 0
3 years ago
Pliss help
Vladimir [108]

Answer: I believe it is artificial selection (not certain though)

Explanation: modern day dogs have been bread an domesticated to be used by humans in ways we see fit.

5 0
3 years ago
If the number is not a proper coefficient, how would you make it one?
Ne4ueva [31]

Answer:

ano........................................................

3 0
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Which of the following characteristics best describe the properties of liquids? Select all that apply.
Assoli18 [71]

Answer:

No definite shape

Explanation:

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A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next fe
pishuonlain [190]
The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.
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3 years ago
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