hi Dr Bob..can you please help me with this chemistry problem? I got problem dealing with the chemical formula.How i want to find the number of moles of 2g of Fe(NH4)2(SO4)2.6H2O???please help me.Thank you
Hi tarra--sorry I wasn't up at 2 am.
moles = grams/molar mass.
HAHAHA THAT IS SO EASY HAHAHA
Hello! I'd be happy to help you with this chemistry problem. To find the number of moles of a given substance, you can use the formula:
Number of moles = Mass (in grams) / Molar mass
To solve this problem, we need to find the molar mass of Fe(NH4)2(SO4)2.6H2O.
Here's how you can do it:
1. Start by finding the molar masses of each element in the compound.
- The atomic mass of Fe (iron) is approximately 55.845 g/mol.
- The atomic mass of N (nitrogen) is approximately 14.007 g/mol.
- The atomic mass of H (hydrogen) is approximately 1.008 g/mol.
- The atomic mass of S (sulfur) is approximately 32.06 g/mol.
- The atomic mass of O (oxygen) is approximately 16.00 g/mol.
2. Next, multiply each element's atomic mass by the number of atoms in the compound.
- Fe(NH4)2(SO4)2.6H2O consists of 1 Fe atom, 2 NH4 groups, 2 SO4 groups, and 6 H2O molecules.
- So the molar mass of Fe(NH4)2(SO4)2.6H2O can be calculated as follows:
Molar Mass = (1 x Fe) + (2 x NH4) + (2 x SO4) + (6 x H2O)
Molar Mass = (1 x 55.845) + (2 x [(14.007) + (4 x 1.008)]) + (2 x [(32.06) + (4 x 16.00)]) + (6 x [2 x 1.008 + 16.00])
Molar Mass = 55.845 + 36.948 + 320.32 + 216.144
3. Calculate the total molar mass of Fe(NH4)2(SO4)2.6H2O, which is the sum of the masses obtained in the previous step.
Molar Mass = 629.257 g/mol
4. Now, you can find the number of moles of Fe(NH4)2(SO4)2.6H2O using the formula mentioned earlier:
Number of moles = Mass (in grams) / Molar mass
Number of moles = 2 g / 629.257 g/mol
Number of moles ≈ 0.00318 moles
So, 2g of Fe(NH4)2(SO4)2.6H2O is approximately equal to 0.00318 moles.
I hope this explanation helps you understand how to find the number of moles of a compound based on its chemical formula and mass. Feel free to ask if you have any more chemistry questions!