Question

A 0.095g sample of gaseous element Y occupies 60.0cm3 at room temperature and pressure.
Determine the number of moles of element Y in 60.0cm3. ?

Answer 1

The number of moles of element Y in 60.0cm3 is 0.0025 mol.

Given:

0.095g sample of gaseous element Y.

It occupies 60.0cm3 at room temperature and pressure.

To find:

Number of moles of element Y in 60.0cm3.

Solution:

We have to ensure we convert the given values to basic and standard units for calculation.

Number of moles = 0.060 / 24

= 0.0025 mol.

After this, if we use the weight given (0.095) and find the molecular mass, we will find that the element is Fluorine.

Number of moles is found to be 0.0025 mol or 2.5× 10⁻³ mol.

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