Calculate the number of moles in 3.20 g of each of the following:
SnO2
Express your answer in moles
To calculate the number of moles in SnO2, we need to know the molar mass of SnO2.
The molar mass of SnO2 is calculated by adding up the atomic masses of each element in the compound.
The atomic mass of Sn (tin) is 118.71 g/mol, and the atomic mass of O (oxygen) is 16.00 g/mol.
So, the molar mass of SnO2 is:
(1 * 118.71 g/mol) + (2 * 16.00 g/mol) = 118.71 g/mol + 32.00 g/mol = 150.71 g/mol
To find the number of moles, we can use the formula:
moles = mass / molar mass
moles = 3.20 g / 150.71 g/mol = 0.0213 mol
Therefore, there are approximately 0.0213 moles in 3.20 g of SnO2.
To calculate the number of moles in a substance, we need to use its molar mass.
The molar mass of SnO2 can be calculated by adding the atomic masses of its constituent elements:
- The atomic mass of Sn (tin) is 118.71 g/mol.
- The atomic mass of O (oxygen) is 16.00 g/mol.
Therefore, the molar mass of SnO2 is 118.71 g/mol + (2 * 16.00 g/mol) = 150.71 g/mol.
Now, we can calculate the number of moles using the given mass of SnO2:
Number of moles = Mass / Molar mass
= 3.20 g / 150.71 g/mol
Calculating this will give us the answer in moles.
To calculate the number of moles in a given amount of a substance, we can use the formula:
moles = mass (in grams) / molar mass
The molar mass of a compound is the sum of the atomic masses of all the atoms in the compound. In this case, we have SnO2 - tin(IV) oxide.
Step 1: Determine the molar mass of SnO2.
The atomic mass of tin (Sn) is 118.71 g/mol, and the atomic mass of oxygen (O) is 16.00 g/mol. Since we have two oxygen atoms in SnO2, the molar mass is:
molar mass of SnO2 = (atomic mass of Sn) + 2 * (atomic mass of O)
= 118.71 + 2 * 16.00
= 118.71 + 32.00
= 150.71 g/mol
Step 2: Calculate the number of moles.
Now that we have the molar mass of SnO2, we can calculate the number of moles using the given mass:
moles = mass (in grams) / molar mass
= 3.20 g / 150.71 g/mol
Using a calculator, we can find:
moles = 0.0212 moles
So, there are approximately 0.0212 moles of SnO2 in 3.20 g.