First you have to convert mmol to mol,
0.0102/1000=1.02*10^-5 mol.
Second, multiply the mol by avogadro's number (6.022*10^23)
(1.02*10^-5)*(6.022*10^23)=6.14244*10^18
Third and last, Round to 3 sig figs
6.14*10^18
Amount of gold = 10.0/197.0 = 0.0508mol
1 mol of Au contains 6.02 x 1023 atoms (avogadro constant).
Therefore 0.0508mol of Au contains 0.0508 x 6.02 x 1023 = 3.06 x 1022 atoms.
Gold has a molecular mass of 196.966569 grams per mole. 10.6 grams is then 53.8 millimoles, which equals 3.240 E22 atoms.
0,62 g gold is equivalent to 0,0336 moles.
3.24 x 1022 atoms of gold.
6.02 x 10 ^23 It's the same number for 1 mol of anything.
1. Three moles of sodium contain 18,06642387.1023 atoms. 2. The mass of three moles of sodium is 68,97 grams.
2.8 moles of gold would be 550g of gold. Multiplying the amount of moles by the molar mass (197.0 grams/moles) will give you the grams by cancelling out the moles units.
Well, firstly you need to know if it is pure gold. Assuming that it is, convert the grams to moles 19.7g Au x 1molAu/197.0gAu = 0.1moles Au And then, to get the number of atoms in 0.1 moles of gold, multiply it by Avogadro's number, 6.22x10^23 atoms per mole 0.1mol Au x 6.22x10^23atoms/mole = 6.22x10^22
divide the mass of the hydrogen by the molar mass.
Gold has a molar mass of 196.96655 grams per mole. 100 grams then is equal to .508 moles which makes 3.059 E23 atoms of gold.
6.02 x 10 ^23 It's the same number for 1 mol of anything.
1. Three moles of sodium contain 18,06642387.1023 atoms. 2. The mass of three moles of sodium is 68,97 grams.
1. Three moles of sodium contain 18,06642387.1023 atoms. 2. The mass of three moles of sodium is 68,97 grams.
Atomic Mass of Na: 23.0 grams1.50 moles × (6.02 × 1023 atoms) = 9.03 × 1023atoms
2.8 moles of gold would be 550g of gold. Multiplying the amount of moles by the molar mass (197.0 grams/moles) will give you the grams by cancelling out the moles units.
5 moles of helium He atoms is equivalent to 20,013 g.
1. Three moles of sodium contain 18,06642387.1023 atoms. 2. The mass of three moles of sodium is 68,97 grams.
By particles, I assume you mean atoms. Firstly, you divide mass by molecular mass to get moles. Then multiply moles by avagadros number to get amount of atoms
Well, firstly you need to know if it is pure gold. Assuming that it is, convert the grams to moles 19.7g Au x 1molAu/197.0gAu = 0.1moles Au And then, to get the number of atoms in 0.1 moles of gold, multiply it by Avogadro's number, 6.22x10^23 atoms per mole 0.1mol Au x 6.22x10^23atoms/mole = 6.22x10^22
5.0 grams gold (1 mole Au/197.0 grams)(6.022 X 1023/1 mole Au) = 1.5 X 1022 atoms of gold ===================
Atomic mass: 207.2 grams.455 moles × (6.02 × 1023) = 2.74 × 1023 atoms of lead