The density of copper (Cu) is about 8.92 g/cm3. So 1 cm3 of copper is about 8.92 g. Next find the number of moles in 8.92 g of copper by dividing by its molecular weight:
8.92 g Cu / 63.54 g/mol Cu = 0.14038 mol Cu
By definition 1 mol of any substance is Avogadro's number of atoms or, 6.022 x 10 23 atoms.
So, 0.14038 mol Cu * [6.022x1023 atoms Cu / mol Cu] = 8.45x1022 atoms of Cu
Find the mass of 1 cm3 of copper.density= mass / volumemass= density * volume (density is about 8.96 g cm-3)mass= 8.96 g cm-3 * 1 cm3 = 8.96 gno. of moles = mass / Molar mass =8.96 g / 63.5 g mol-1 = 0.14 molno. of copper atoms in 1 cm3 of copper= 0.14 mol * 6.022 *1023 =8.4 * 1022 atoms
Copper on the Periodic Table of Elements is Cu. Copper is 1 atom. Sulphur on the Periodic Table of Elements is S. Sulphur is 1 atom. Oxygen on the Periodic Table of Elements is O. Since there is a 4 next to the O, it's 4 atoms of Oxygen. 1 Atom of Copper + 1 Atom of Sulphate + 4 Atoms of Oxygen = 6 Atoms.
The formula for 1 atom of copper and 2 atoms of chlorine is CuCl2, which represents one copper atom bonded to two chlorine atoms.
There are 1 mol of phosphorus atoms in 1 mol of copper (II) phosphate. Therefore, in 3.30 mol of copper (II) phosphate, there are 3.30 mol of phosphorus atoms, which is equivalent to 3.30 x 6.022 x 10^23 = 1.97 x 10^24 atoms of phosphorus.
Number of atoms in a unit cell:4 atomscompletely inside cellEach of the 8 atoms on corners are shared among cells count as 1 atom inside cellEach of the 6 atoms on the faces are shared among 2cells  count as 3 atomsinside cellTotal number inside the cell = 4 + 1 + 3 = 8Cell volume:(.543 nm)3 = 1.6 x 10-22 cm3Density of silicon atoms= (8 atoms) / (cell volume) = 5 x 1022 atoms/cm3
1 mol Cu Atoms (6.02x10^23 atoms)
Copper(I) oxide (Cu2O) contains 3 atoms: 2 copper atoms and 1 oxygen atom.
Find the mass of 1 cm3 of copper.density= mass / volumemass= density * volume (density is about 8.96 g cm-3)mass= 8.96 g cm-3 * 1 cm3 = 8.96 gno. of moles = mass / Molar mass =8.96 g / 63.5 g mol-1 = 0.14 molno. of copper atoms in 1 cm3 of copper= 0.14 mol * 6.022 *1023 =8.4 * 1022 atoms
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There are approximately 5 x 10^22 silicon atoms in 1 cm^3 of material.
From the density and volume, the mass of this amount of copper is 8.96 grams. There are 63.546 grams in 1 mole of copper, so this is 0.141 moles. There are 6.023 x 10²³ atoms in 1 mole. Multiply this by 0.141 moles = 8.492 x 10²² atoms.
The density of iron, Fe, at room temperature is 7.874 g/cm3. So 1cm3 of iron has a mass of 7.874g. 1 mole iron = 55.845g Fe = 6.022 x 1023 atoms Fe. 7.874g Fe x 6.022 x 1023 atoms Fe/55.845g Fe = 8.491 x 1022 atoms Fe
Copper on the Periodic Table of Elements is Cu. Copper is 1 atom. Sulphur on the Periodic Table of Elements is S. Sulphur is 1 atom. Oxygen on the Periodic Table of Elements is O. Since there is a 4 next to the O, it's 4 atoms of Oxygen. 1 Atom of Copper + 1 Atom of Sulphate + 4 Atoms of Oxygen = 6 Atoms.
I think there is one atom of copper and four atoms of sulfur but you should get a second opinion. I am 98% sure this is correct.
6.022*10**23 atoms / mol = avagadro's constant 63.546 g / mol = atomic weight of copper 1 atom / 6.022*10**23 atoms/mol * 63.546 g/mol = 1.05523082*10**-22g 1 g / 63.546 g/mol * 6.022*10**23 atoms/mol = 9.476599629*10**21 atoms
Copper on the Periodic Table of Elements is Cu. Copper is 1 atom. Sulphur on the Periodic Table of Elements is S. Sulphur is 1 atom. Oxygen on the Periodic Table of Elements is O. Since there is a 4 next to the O, it's 4 atoms of Oxygen. 1 Atom of Copper + 1 Atom of Sulphate + 4 Atoms of Oxygen = 6 Atoms.
There are 3 moles of S atoms in 120.0g of Copper(II) Sulfate. In one mole of Copper(II) Sulfate, there are 4 moles of oxygen atoms, 1 mole of sulfur atoms, and 1 mole of copper atoms. Since the molar mass of Copper(II) Sulfate is 159.61 g/mol, the molar mass of sulfur is 32.065 g/mol. Hence, there are 3 moles of sulfur atoms in 120.0g of Copper(II) Sulfate.