Q:

# How many electrons make up one coulomb of charge?

A:

One coulomb of charge has the equivalent charge of 6.25x10^18 electrons. This is determined from the value of charge on one electron and the value of charge for 1 coulomb.

Know More

## Keep Learning

The algebraic solution is laid out by DronStudy as follows:

One electron has a charge equivalent of 1.6x10^-19 coulomb. This is written as 1.6x10^-19 C = 1 electron.

To get the value of 1 C, both sides of the equation have to be divided by 1.6x10^-19. This is written as 1 C = 1/1.6x10^-19 electrons. Dividing 1 by 1.6x10^-19 gives a value of 6.25x10^18 electrons per coulomb.

Given this value, the number of electrons passing through a circuit over a given time can be calculated. One ampere equals 1 coulomb per second. Therefore, a vacuum cleaner with a 3.5-amp motor uses 3.5 coulomb per second multiplied by 6.25x10^18 electrons/coulomb, or 21.875x10^18 electrons per second. That is 21,875,000,000,000,000,000 electrons every second!

This equivalency can also be used to determine the number of electrons required to do a given amount of work. Given that 1 volt equals 1 joule/coulomb, a circuit producing 18 joules of work off of a 9-volt power source would require 2 coulombs worth of charge, or 12.5x10^18 electrons.

Sources:

## Related Questions

• A:

Selenium contains four unpaired electrons in its outermost orbital. These electrons can form bonds with other elements and are called valence electrons. On the periodic table, selenium is element number 34; it is located in group 16 below oxygen and sulfur. This group of elements is sometimes called the chalcogens.

Filed Under:
• A:

Helium has two valence electrons. As an element, helium is very stable and contains a single s-orbital on its outer shell.

Filed Under:
• A:

In its ground, or lowest-energy, state, carbon has two unpaired electrons. However, there are four total outer, or valence, electrons, meaning carbon atoms have four possible bonding sites.