Molar mass is the mass of one mole of a substance. To calculate the molar mass of a compound, you need to know the atomic masses of the elements that make up the compound.
For example, if you have a compound with the formula MO2, you need to know the atomic mass of M and the atomic mass of oxygen.
Once you have the atomic masses, you can calculate the molar mass of the compound by multiplying the atomic mass of each element by the number of atoms of that element in the compound.
For example, if M has an atomic mass of 5.73 and oxygen has an atomic mass of 16, the molar mass of MO2 would be 5.73 x 1 + 16 x 2 = 37.46.
The element M could be any element with an atomic mass of 5.73, such as hafnium (Hf).
The weight percent of oxygen in an oxide that has the formula MO2, is 15.2%. What is the molar mass of this compound? What element or elements are possible for M?
what can someone give me a push in the right direction????
Let x be the taonic mass of the unknown element.
Solve the equation
x/(32 + x) = 0.152
Solve for x. It should closely agree with the atomic mass of hafnium. There IS an HfO2 molecule
If I run this calculation I obtain 5.73 for x. I wonder if the expression should be
x/(32+x) = 100-15.2=.848??
And I made a typo (actually, two typos, both placing the decimal point); it should be
1.00-0.152=0.848
Could you please set up a tutorial of how to work out molar mass. Could it please include step by step procedures of how to work the problem out.
I misread your question. Please ignore my previous answer
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