The charge carried by one electron is e = -1.6 × 10-19 C. The number of electrons necessary to produce a charge of -1.0 C is:

Q= the overall charge

N= number of deficit electrons
e= charge of one electron

Q= Ne
-1.0= N (-1.6 x 10^-19)
N= -1.0/ (-1.66 x 10 ^-19)

To find the number of electrons necessary to produce a charge of -1.0 C, we can divide the total charge (-1.0 C) by the charge carried by one electron (-1.6 × 10^-19 C).

Number of electrons = Total charge / Charge per electron

Number of electrons = -1.0 C / (-1.6 × 10^-19 C)

Number of electrons ≈ 6.25 × 10^18 electrons

To find the number of electrons necessary to produce a charge of -1.0 C, we can use the equation:

Charge (Q) = Number of electrons (n) × Charge carried by one electron (e)

Rearranging the equation to solve for the number of electrons (n), we get:

n = Q / e

Now we just need to plug in the given values:

Q = -1.0 C (negative because it represents a negative charge)
e = -1.6 × 10^(-19) C

n = (-1.0 C) / (-1.6 × 10^(-19) C)

To simplify the calculation, we can use scientific notation:

n = -1.0 / -1.6 × 10^(-19 - (-19))

Now, let's simplify the equation:

n = 1.0 / 1.6 × 10^0

Since any number divided by 1 is itself, we get:

n = 1.0 / 1.6

Evaluating the division:

n ≈ 0.625

Therefore, the number of electrons necessary to produce a charge of -1.0 C is approximately 0.625.