Cisplatin, a drug used in the treatment of certain types of cancer has the molecular formula Pt(NH3)2Cl2.
How many moles of compound are in 254.09 grams of the compound?
mols = grams/molar mass
To find the number of moles in a given mass of a compound, you need to use the formula:
moles = mass / molar mass
First, let's calculate the molar mass of cisplatin (Pt(NH3)2Cl2):
- The atomic mass of Pt (platinum) is approximately 195.08 g/mol.
- The atomic mass of N (nitrogen) is approximately 14.01 g/mol.
- The atomic mass of H (hydrogen) is approximately 1.008 g/mol.
- The atomic mass of Cl (chlorine) is approximately 35.45 g/mol.
Since cisplatin has two nitrogen atoms, we multiply the atomic mass of nitrogen by 2.
Molar mass of Pt(NH3)2Cl2 = (195.08 g/mol) + 2 * [(14.01 g/mol) + (3 * 1.008 g/mol)] + 2 * 35.45 g/mol
Now, we can substitute the values into the formula:
moles = mass / molar mass
moles = 254.09 g / molar mass
You can calculate the molar mass using a calculator or software, and then substitute it into the equation to find the number of moles.