Q = E / V
where V is the voltage
E is the energy
Q is the charge
Q = 55x10-12 / 9
Q = 6.11x10-12 C
If charge carried per electron is 1.602x10-19 C
the the number of electrons that carry a charge of 6.11x10-12 C will be 6.11x10-12 / 1.602x10-19
number of electrons =3.8x107 electorns
#2 1. How many moles of electrons are represented by a total charge of 1.0 C?...
1.) In Faraday’s electrolysis experiment, he used approximately 96,500 C of charge. A) How many moles of electrons is that? [This also explains where the unit of moles disappeared during the example in class.] B) We are going to use Faraday’s law of electrolysis to find the weight of a magnesium atom. [Magnesium has two valence electrons.] A current of 70.0 A flows through a solution of MgCl2 for 1.25 hours. Find the total charge and total number of electrons....
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An electron has a charge of -1.6 x 10-19 C. How many electrons would be needed to produce a net charge of -12.4 x 10-5 The required number of electrons is 1014
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(10%) Problem 2: Electrons have a charge of q--1.602 x10-19 C. A student observes that a Styrofoam cup has a total charge oi -0.205 uC 50% Part (a) write an expression for the number of excess electrons Nin the cup. Gr De HOME Att 1 2 3 deta 4 BACKSPACE CLEAR Submit Hint I give up! Hints: 0% deduction per hint. Hints remaining: 2 Feedback: 0% deduction per feedback. 50% Part (b) How many excess electrons are in the cup?
#3) An electron has a charge of-1.6 x 1019 C. How many electrons would be needed to produce a net charge of -11.2 x 10 C?
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