Just need answers ? We want to find how much charge is on the electrons in a nic

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Just need answers ?

We want to find how much charge is on the electrons in a nickel coin. Follow this method. A nickel coin has a mass of about 4.9 g. Find the number of atoms in a nickel coin. Each mole (0.02 Times 1023 atoms) has a mass of about 57.8 g. Answer in units of atoms Find the number of electrons in the coin. Each nickel atom has 28 electrons/atom. Answer in units of electrons Find the magnitude of the charge of all these electrons. Answer in units of C A strong lightning bolt transfers an electric charge of about 25 C to Earth (or vice versa). How many electrons are transferred? Avo- gadro's number is 6.022 Times 1023/mol, and the elemental charge is 1.(302 Times 10 C. 005 If each water molecule donates one electron, how much water is ionized in the lightning? One mole of water has a mass of 17.8 g/mol. Answer in units of g A strong lightning bolt transfers about 25 C to Earth. How many electrons are transferred? The elementary charge is 1.60218 Times 10-19C. You have 1.4 kg of water. One mole of water has a mass of 18.1 g/mole and each molecule of water contains 10 electrons since water is H20.What is the total electron charge contained

Explanation / Answer

1)

number of atoms = N

N = (4.9/57.8) * 6.02e23 = 5.10346e22 = 5.10 x 10^22 atoms

2)

N' = 28 * ( 5.10346e22) = 1.429e24 = 1.43 x 10^24 electrons

3)

q = 1.6e-19 * (1.429e24) = 2.2864e5 = 2.27 x 10^5 C

4)

N = q/e = 25/1.602e-19 = 1.5605e20 = 1.56 x 10^20 electrons

5)

number of moles = 1.5605e20/6.022e23 = 2.5913e-4 moles

m = 17.8 * 2.5913e-4 = 4.61 x 10^-3 g

6)

N = q/e = 25/1.602e-19 = 1.5605e20 = 1.56 x 10^20 electrons

7)

N = (1.4e3/18.1) * 6.022e23 * 10 *1.6e-19 = 7.45 x 10^7 C

13)

Repulsive

14)

F = k q^2/r^2 = 9e9*1.6e-19*1.6e-19/(0.9e-2*0.9e-2) = 2.84 x 10^-24 N

15)

F = G m^2/r^2 = 6.7e-11*1.7e-27*1.7e-27/(0.9e-2*0.9e-2) = 2.39 x 10^-60 N

16)

F = sqrt(2)*(8.98755e9)*(5e-9*8e-9)/(6*6) = 14.1 nN

17)

135 degrees

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