0.250 X Avogadro's Number = 1.51 X 1023, to the justified number of significant digits.
One atom in the formula unit.
Vanadium does not have moles but rather formula units. The formula unit for vanadium is a single atom. Therefore, the number of formula units in any number of atoms is equal to the number of atoms divided by Avogadro's Number, in this instance 7.17 X 10-3 formula units.
A 88,1 gram sample of Ag contain 4,9185.10e23 atoms.
The number of atoms is 1,50553521.10e23.
Take the actual sample weight of 13grams, and divide it by the atomic weight of chromium. This gives you your molar percentage of atoms. Now multiply this molar percentage by Avogadro's constant, the number of atoms in one mole, and this will give you your number of atoms in the sample.
1.182168075x1025
One atom in the formula unit.
Vanadium does not have moles but rather formula units. The formula unit for vanadium is a single atom. Therefore, the number of formula units in any number of atoms is equal to the number of atoms divided by Avogadro's Number, in this instance 7.17 X 10-3 formula units.
A 88,1 gram sample of Ag contain 4,9185.10e23 atoms.
After 10740 years, half of the sample would have decayed, so there would be 200 atoms left. If the original sample had 400 atoms, then there would be 200 atoms left in the sample after 10740 years.
The number of atoms is 1,50553521.10e23.
There are approximately 6 x 10^22 atoms in a 12.0 gram sample of sodium.
Approx. 9.1024 atoms.
Take the actual sample weight of 13grams, and divide it by the atomic weight of chromium. This gives you your molar percentage of atoms. Now multiply this molar percentage by Avogadro's constant, the number of atoms in one mole, and this will give you your number of atoms in the sample.
This depends on the mass of the gold sample.
Two electrons are in the external shell of vanadium.
The answer is 6,2729.10e+26 carbon atoms.