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PilotLPTM [1.2K]
3 years ago
14

What happens when a book falls of a desk?

Chemistry
2 answers:
SVEN [57.7K]3 years ago
7 0

Answer:

is there a question to this to at you need help with?

MatroZZZ [7]3 years ago
5 0

Answer:

Happy Face excellent song

Explanation:

and gravity takes the book and pulls it to the ground

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Hat is the oxidation state of each element in the compound CaSO4? Include + or - in your answers as appropriate.
quester [9]
As per the rule, oxidation number of alkaline earth metals in their compounds is +2. Oxidation number of oxygen in it's compounds is -2(except peroxides) and the sum of oxidation numbers of all the elements of a neutral compound is zero.
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Calculate the pH of a 2.3 10-3M[OH'] solution.
disa [49]

Answer:

11.33

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Calculate the pH and pOH of 500.0 mL of a phosphate solution that is 0.285 M HPO42– and 0.285 M PO43–. (Ka for HPO42- = 4.2x10-1
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