calculate % tin by weight in tin oxide.
SnO2.
78.77%?
right.
To calculate the percentage of tin by weight in tin oxide (SnO2), you need to determine the molar mass of tin oxide and the molar mass of tin.
Step 1: Calculate the molar mass of SnO2
The molar mass of an element is the mass of one mole of that element. The molar masses of elements are found from the periodic table.
The atomic mass of Sn (tin) is 118.71 g/mol, and the combined atomic masses of O (oxygen) is 2 * 16.00 g/mol = 32 g/mol. Therefore, the molar mass of SnO2 is:
1 * 118.71 g/mol (Sn) + 2 * 16.00 g/mol (O) = 118.71 g/mol + 32.00 g/mol = 150.71 g/mol.
Step 2: Calculate the mass of tin (Sn) in SnO2.
To determine the mass of tin in tin oxide, you need to determine the portion of the total molar mass that corresponds to tin.
The atomic mass of tin in SnO2 is 118.71 g/mol, so the portion of Sn in the overall molar mass is:
(atomic mass of Sn / molar mass of SnO2) * 100% = (118.71 g/mol / 150.71 g/mol) * 100% = 78.77%.
Therefore, the weight percent of tin in tin oxide (SnO2) is approximately 78.77%.