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Lemur [1.5K]
3 years ago
6

Describe how you think the tiny dust particles acquired a charge.

Chemistry
1 answer:
miskamm [114]3 years ago
7 0
Whenever they move, they get a charge from the moment. <span />
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If 135.7 J of heat are added to 54.0 g of water initially at 25.0 °C . What is the final temperature of the water?
german

Answer:

The final temperature of the water is 25.6 °C.

Explanation:

We have,

Heat added to water is 135.7 J

Mass, m = 54 g

Initial temperature was 25 °C

It is required to find the final temperature of the water. The heat added when temperature is increased is given in terms of specific heat capacity as :

Q=mc(T_f-T_i)

T_f is final temperature

c is specific heat capacity, for water, c=4.184\ J/g^{\circ} C

So,

T_f=\dfrac{Q}{mc}+T_i\\\\T_f=\dfrac{135.7}{54\times 4.184}+25\\\\T_f=25.6^{\circ} C

So, the final temperature of the water is 25.6 °C.

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Tai ran from his home to a position 300 m south of his home in 100 seconds. What was his velocity?
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Assume you do not know which peak in GC chromatogram corresponds to each alkene (and you are not sure whether the one with lower
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Spiking involves gradually increasing the concentration of one specific compound, and looking for a rise in peak height. Here, you can identify which peak corresponds to the compound you spiked. You can do this for each alkene, to determine its peak and retention time.
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