A 85.2-mg sample of the compound X4O10 contains 48.0 mg of oxygen atoms. What is the atomic mass of element X?
See Damon's response above.
To find the atomic mass of element X, we need to calculate the total mass of X atoms in the compound X4O10 and then subtract the mass of the oxygen atoms.
The compound X4O10 contains 4 atoms of element X and 10 atoms of oxygen (O).
Given that the sample of compound X4O10 weighs 85.2 mg and contains 48.0 mg of oxygen atoms, we can subtract the mass of oxygen from the total mass of the compound to find the mass of element X.
Mass of X4O10 = 85.2 mg
Mass of oxygen (4O) = 48.0 mg
Mass of X = Mass of X4O10 - Mass of oxygen
= 85.2 mg - 48.0 mg
= 37.2 mg
Therefore, the atomic mass of element X is 37.2 mg.