In one mole or 18 grams of water, the total negative charge of all the electrons is:
a. zero because its electrically neutral.
b. less than one C
c. almost 100,000 C.
d. almost one million C.
e. none of these
One mole contains 6.02*10^23 molecules.
Each H2O molecule contains 10 electrons (eight in the O atom and one each in the hydrogen atoms). Each electron has a charge of 1.6*10^-19 C
Multiply those numbers together for the answer. It's close to a million.
To determine the total negative charge of all the electrons in one mole or 18 grams of water, we need to know the number of electrons in one mole of water.
To find the number of electrons, we can use Avogadro's number, which states that 1 mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, or in this case, water molecules).
The formula for water is H2O. In one molecule of water, there are two hydrogen atoms (H) and one oxygen atom (O). Each hydrogen atom has one electron, and the oxygen atom has 8 electrons. So, in one molecule of water, there are a total of 10 electrons.
Now, we can calculate the number of moles of water in 18 grams. The molar mass of water (H2O) is approximately 18 grams/mol. Therefore, 18 grams of water is equal to 1 mole of water.
Since each mole of water contains 6.022 x 10^23 molecules and each molecule contains 10 electrons, the total number of electrons in one mole of water is:
6.022 x 10^23 molecules/mol * 10 electrons/molecule = 6.022 x 10^24 electrons/mol
Now, considering the answer choices:
a. Zero - This is incorrect because water does contain electrons, so it is not electrically neutral.
b. Less than one C - One Coulomb (C) is equivalent to 6.242 x 10^18 electrons. The total number of electrons in one mole of water is much greater than this value, so this option is also incorrect.
c. Almost 100,000 C - This option is also incorrect because 100,000 C equates to about 6.242 x 10^23 electrons, which is less than the actual number of electrons in one mole of water.
d. Almost one million C - One million Coulombs (million C) is equivalent to 6.242 x 10^24 electrons, which is the same as the number of electrons in one mole of water. Therefore, this option is the correct answer.
e. None of these - This option is incorrect because option (d) is the correct answer.
So, the total negative charge of all the electrons in one mole or 18 grams of water is almost one million Coulombs (d).