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Katena32 [7]
3 years ago
12

The top speed of a plane is 236 m/s at which its kinetic energy is 976,000 J. What is its mass?

Chemistry
1 answer:
fiasKO [112]3 years ago
3 0
4,135.593220338983 however you should round this up to 4135.59
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Write a method that could be used to produce pure crystals of copper chloride from copper oxide and hydrochloric acid.
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Explanation:

The reaction between copper oxide (CuO) and hydrochloric acid (HCl) will produce copper chloride (CuCl₂) and water:

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In a beaker which contain cooper oxide add the hydrochloric acid. To avoid working with concentrated hydrochloric acid, the acid may be diluted with water but make sure the add the stoechiometric amount (and a little bit of excess) in respect with the copper oxide.

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Let the reaction proceed and then filter the solution to remove the unreacted cooper oxide.

Let the filtered solution, which contain copper chloride, water and unreacted hydrochloric acid, to stand undisturbed for several days. You may see the crystals growing from the solution. To speed up the process you may reduce the temperature.

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purifying compounds

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