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Shtirlitz [24]
3 years ago
13

EXPLAIN why a skateboard coasting on a flat surface slows down and comes to a stop

Chemistry
1 answer:
ankoles [38]3 years ago
6 0
A skateboard coasting on a flat surface slows down and then comes to a stop because the skateboard runs out of energy, and slows down, also, sense it is on a flat surface and not going downhill, it goes slower.
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Why is the statue of liberty made out of copper and not zinc?.
Westkost [7]

Answer:

The statue of liberty was made of copper. Copper is extremely weather-resistant. It will gradually oxidize copper chloride, which is greenish in

Explanation:

Because it copper and it greenish

5 0
3 years ago
I NEED HELP PLEASE, THANKS! :)
Elan Coil [88]

Answer:

Hi there!

Based on my own words, the electron cloud is a shell surrounding the nucleus that only consists of electrons.

6 0
3 years ago
The PH of a 0.1 M MCl (M is an unknown cation) was found to be 4.7. Write the net ionic equation for the hydrolysis of M and its
Serggg [28]

Answer:

6.25 X10^{-9} = Ka

Kb= \frac{10^{-14}}{6.25 X10^{-9}}= 1.6X10^{-6}

Explanation:

The ionic equation for the hydrolysis of the cation of the given salt will be:

M^{+} + H_{2}O ---> MOH + H^{+}

The expression for Ka will be:

Ka = \frac{[H^{+}][MOH]}{[M^{+}]}

As given that the concentration of the salt is 0.1 M and pH of solution = 4.7, we can determine the concentration of Hydrogen ions from the pH

pH = -log [H⁺]

[H⁺] = antilog(-pH) = antilog (-4.7) = 2 X 10⁻⁵ M = [MOH]

Let us calculate Ka from this,

Ka = {2.5X10^{-5}X2.5X10^{-5}}{0.1} = 6.25 X10^{-9}

The relation between Ka an Kb is

KaXKb =10⁻¹⁴

Kb= \frac{10^{-14}}{6.25 X10^{-9}}= 1.6X10^{-6}

6 0
3 years ago
Which of the following is the correct name for CC14?
madreJ [45]

Answer:

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8 0
3 years ago
A student in your class suggests that when most people watch exciting sporting events on television , their pulse rates increase
pashok25 [27]
DO STUFF!!! XD but really you would record there heartbeat per minute and record there normal rate and the rate watching sports!
5 0
4 years ago
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