not exactly sure what to do ... How many electrons make up a charge of -30.0 micro coulombs ? [1.9 x 10^14]
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Originally Posted by rock candy not exactly sure what to do ... How many electrons make up a charge of -30.0 micro coulombs ? [1.9 x 10^14] Charge of an electron is -1.6 x 10^(-19) Coulomb 1 Micro coulomb = 10^(-6) C Anything else required??
no i knew that its 3.0 * 10 ^-6 C ... im not sure how they got 1.9*10^14 as an answer
Originally Posted by rock candy no i knew that its 3.0 * 10 ^-6 C ... im not sure how they got 1.9*10^14 as an answer Number of electrons in 1.6 * 10^(-19) C = 1 So number of electrons in 30 * 10^(-6) C $\displaystyle = \frac{30 * 10^{(-6)} C}{1.6 * 10^{(-19)} C}$ $\displaystyle = \frac{30 * 10^{(-6+19)} }{1.6}$ $\displaystyle = 1.9*10^{14}~ electrons $
LOL omg ... i think im sleepy ... i kept doing this 1.6*10^-19 / 3.0*10^-6 ... thanks
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