Question

A 1.00g of sample of metal X combines with 0.2200g of oxygen calculate atomic weight of metal X if formula formed is XO2

Answer 1

The atomic weight of metal X is 1.00 atomic mass units.

Calculating the atomic weight:

To calculate the atomic weight of metal X, use the given information about the mass of metal X and the mass of oxygen.

The formula XO₂ indicates that one atom of metal X combines with two atoms of oxygen to form the compound.

From this information,

Set up a ratio between the masses of metal X and oxygen:

(mass of metal X) : (mass of oxygen) = (1 atom of metal X) : (2 atoms of oxygen)

Let's substitute the given masses into the ratio:

1.00g : 0.2200g = 1 : 2

Now determine the ratio of the mass of metal X to the number of atoms of metal X. The atomic weight is the mass of one atom of the element.

Since the ratio, in this case, is 1:1, the mass of metal X (in grams) is equal to its atomic weight (in atomic mass units).

Therefore,

The atomic weight of metal X is 1.00 atomic mass units.

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