A 85.2-mg sample of the compound X4O10 contains 48.0 mg of oxygen atoms. What is the atomic mass of element X?
85.2 - 48 = 37.2 mg of X
4 X atoms for every 10 O atoms
10 * 16 = 160
4 * X = 4x
4x/160 = 37.2/48
4 X = 160 *37.2/48
X = 31
check
31 * 4 = 124
16 *10 =160
124/160 = .775
and
37.2/48 = .775 good
Ah, chemistry, the realm of elements and compounds! Let's do some calculations, shall we?
So, we have a compound called X4O10, and we know that it contains 48.0 mg of oxygen atoms. Now, to figure out the atomic mass of element X, we need to subtract the mass of the oxygen atoms from the total mass of the compound.
If the compound has a mass of 85.2 mg and the oxygen atoms contribute 48.0 mg to that total, then the remaining mass must be the mass of element X.
So, to find the atomic mass of element X, we subtract the mass of the oxygen atoms (48.0 mg) from the mass of the compound (85.2 mg):
85.2 mg - 48.0 mg = 37.2 mg
Voila! The atomic mass of element X is 37.2 mg. Though I have to admit, it's a pretty light element. Maybe it's a secret ingredient in featherweight materials!
To find the atomic mass of element X in the compound X4O10, we can use the given information about the total mass of the compound and the mass of oxygen atoms.
Step 1: Calculate the total mass of the compound X4O10.
The total mass of the compound X4O10 is given as 85.2 mg.
Step 2: Calculate the mass of oxygen in the compound X4O10.
The mass of oxygen atoms in the compound X4O10 is given as 48.0 mg.
Step 3: Subtract the mass of oxygen from the total mass of the compound to determine the mass of element X.
Mass of element X = Total mass of compound - Mass of oxygen
Mass of element X = 85.2 mg - 48.0 mg
Step 4: Calculate the atomic mass of element X.
Atomic mass of element X = Mass of element X / Number of moles
Atomic mass of element X = (85.2 mg - 48.0 mg) / Number of moles
To find the number of moles, we need to use the molar mass of oxygen. The molar mass of oxygen is approximately 16 g/mol.
Step 5: Convert the given masses from mg to g.
Total mass of the compound = 85.2 mg = 85.2 mg / 1000 = 0.0852 g
Mass of oxygen = 48.0 mg = 48.0 mg / 1000 = 0.048 g
Step 6: Calculate the number of moles of oxygen.
Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen
Number of moles of oxygen = 0.048 g / 16 g/mol = 0.003 moles
Step 7: Calculate the atomic mass of element X.
Atomic mass of element X = (0.0852 g - 0.048 g) / 0.003 moles = 11.2 g/mol
Therefore, the atomic mass of element X in the compound X4O10 is approximately 11.2 g/mol.
To find the atomic mass of element X, we need to use the given information about the compound X4O10 and the amount of oxygen atoms.
The compound X4O10 consists of 4 atoms of element X and 10 atoms of oxygen. We are given that the mass of oxygen atoms present in the compound is 48.0 mg.
To determine the atomic mass of element X, we can calculate the mass of the compound minus the mass of the oxygen atoms.
Mass of X4O10 = 85.2 mg
Mass of oxygen (O) atoms = 48.0 mg
Mass of element X = Mass of X4O10 - Mass of oxygen atoms
Mass of element X = 85.2 mg - 48.0 mg
Mass of element X = 37.2 mg
Therefore, the atomic mass of element X is 37.2 mg.