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3 years ago

9

Lea has just ordered a box of "universal" litmus paper. She dips one piece into vial A, and it turns green. She dips another pie

ce into vial B, and it turns red.
Which vial, A or B, contains a greater concentration of H+ ions?

2 answers:

-BARSIC- [3]3 years ago

8 0

the correct answer is b

guapka [62]3 years ago

3 0

The correct answer is B

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Answer:

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Explanation:

Since plate is square, area, A is given by $(8.7/100)^{2}=0.007569m^{2}$

The distance between plates, d, is given in the question as 2mm=0.002m

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Assuming mica dielectric constant, k of 7

Capacitance, C is given by

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Therefore, the stored energy is 122.84 J

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