if you have 55.6 grams of nitrate ions in a compound that consists of nitrate ions and plumbous ions, how many grams of the compound do you have?
how do i do this problem im completely stuck!?
The formula of the compound form from Pb^2+ and NO3^-1 ions is Pb(NO3)2.
To answer the question,find the formula masses of Pb(NO3)2 and (NO3) times 2 .
grams Pb(NO3)2 = [Pb(NO3)2 / (NO3)(2)](55.6g)
Would that consist also of 54.4 grams of plumbous ions, or no?
To solve this problem, you need to use the atomic masses of the elements present in the compound and their respective stoichiometric coefficients from the chemical formula.
1. Find the atomic mass of each element:
- The atomic mass of Nitrogen (N) is 14.01 g/mol.
- The atomic mass of Oxygen (O) is 16.00 g/mol.
- The atomic mass of Lead (Pb) is 207.2 g/mol.
2. Calculate the molar mass of the nitrate ion (NO3-):
- The molar mass of Nitrogen (N) is 14.01 g/mol.
- The molar mass of Oxygen (O) is 16.00 g/mol (3 oxygen atoms in NO3-).
- Multiply the molar mass of oxygen by 3 and add the molar mass of nitrogen to get the molar mass of NO3-:
Molar mass of NO3- = (3*16.00 g/mol) + 14.01 g/mol = 62.01 g/mol.
3. Calculate the number of moles of nitrate ions:
- Divide the given mass of nitrate ions (55.6 g) by the molar mass of NO3-:
Moles of NO3- = Mass of nitrate ions / Molar mass of NO3-.
4. Determine the stoichiometric coefficient of nitrate ions in the compound:
- The compound consists of nitrate ions (NO3-) and plumbous ions (Pb). Based on the compound's formula, "plumbous" denotes the presence of the lead (Pb2+) cation, which means that the stoichiometric coefficient of nitrate ions is 2. Therefore, for every nitrate ion, there are two nitrate ions and one plumbous ion.
5. Calculate the number of moles of the compound:
- Multiply the moles of nitrate ions by the stoichiometric coefficient:
Moles of compound = Moles of NO3- * (2 nitrate ions / 1 nitrate ion).
6. Calculate the mass of the compound:
- Multiply the moles of the compound by the molar mass of the compound:
Mass of compound = Moles of compound * Molar mass of the compound.
By following these steps, you should be able to find the number of grams of the compound.