For this problem, the Atomic Mass is required. Take the mass in grams and divide it by the atomic mass. Then multiply it by Avogadro's constant, 6.02 × 1023.
3.14 grams Cu / (63.5 grams) × (6.02 × 1023 atoms) = 2.98 × 1022 atoms
There are 5 atoms in one molecule of Cu(OH)2, comprising one copper (Cu) atom, two oxygen (O) atoms, and two hydrogen (H) atoms.
There are a total of 9 atoms in Cu(NO3)2. This includes 1 copper (Cu) atom, 2 nitrogen (N) atoms, and 6 oxygen (O) atoms.
There are 11 atoms in one formula unit of Cu(NO3)2: one copper atom (Cu), two nitrogen atoms (N), six oxygen atoms (O), and two nitrogen atoms (N) from the nitrate (NO3) group.
To determine the number of Cu atoms in the piece of sterling silver jewelry, you would first need to convert the weight of the jewelry to moles using the molar mass of silver. Then, since sterling silver is typically 92.5% silver and 7.5% copper by weight, you can calculate the number of moles of copper present. Finally, use Avogadro's number to convert from moles to atoms.
Since there are more Cu atoms than O or H atoms in the reactants, it is likely that Cu will be the limiting reactant in the reaction. This means that there will likely be leftover O and H atoms after the reaction is complete. The products will likely contain Cu, O, and H atoms in different ratios based on the stoichiometry of the reaction.
To calculate the number of Cu atoms in 85 mol, you need to use Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol. So, for 85 mol of Cu, the number of Cu atoms would be 85 mol x 6.022 x 10^23 atoms/mol = 5.12 x 10^25 Cu atoms.
Copper(II) nitrate has six oxygen atoms.
There are 5 atoms in one molecule of Cu(OH)2, comprising one copper (Cu) atom, two oxygen (O) atoms, and two hydrogen (H) atoms.
There are a total of 9 atoms in Cu(NO3)2. This includes 1 copper (Cu) atom, 2 nitrogen (N) atoms, and 6 oxygen (O) atoms.
There are 6 oxygen atoms present in one formula unit of Cu(NO3)2. To find the number of oxygen atoms in a 14.0 g sample, you would need to calculate the number of formula units in 14.0 g of Cu(NO3)2. Then, multiply that by 6 to find the total number of oxygen atoms in the sample.
The compound copper nitrate has Cu(NO3)2 for a chemical formula. In that formula, we see that there is an NO3 radical present, and that there are 3 atoms of oxygen in that radical (the sub 3 after the O). But there are 2 of those NO3 radicals (the sub 2 outside of the parens) present in this compound. That means that there are 3 x 2 oxygen atoms in a molecule of copper nitrate, or 6 atoms of oxygen in Cu(NO3)2.
Divide that number of atoms by 6.02x10^23 atoms/mole
4.0 moles Cu (6.022 X 1023/1 mole Cu) = 2.4 X 1024 atoms of copper ====================
1 mol Cu Atoms (6.02x10^23 atoms)
15.8 moles Cu x 6.02x10^23 atoms/mole = 9.51x10^22 atoms. There are no molecules in the element Cu (copper). Molecules are found when there are two or more atoms bound together, such as in H2 gas or H2O, etc.
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There are 11 atoms in one formula unit of Cu(NO3)2: one copper atom (Cu), two nitrogen atoms (N), six oxygen atoms (O), and two nitrogen atoms (N) from the nitrate (NO3) group.