Question

11. Elements A and Q form two compounds, AQ and A2Q3. The mass ratio (massQ)/(mass A) for AQ is 0.574. What is the mass ratio (mass Q)/(mass A) for A2Q3?​

Answer 1

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Answer 2

Given:

Mass ratio (massQ)/(mass A) for AQ $=0.574$

To Find: Mass ratio (mass Q)/(mass A) for $\[{A_2}{Q_3}\]$

Solution:

As it is given, the mass ratio for AQ

$\[\frac{{Mass\,Q}}{{Mass\,A}} = 0.574\]$         ... (i)

Therefore, the mass ratio for $\[{A_2}{Q_3}\]$

$\[\frac{{Mass\,Q}}{{Mass\,A}} = \frac{{3 \times Mass\,Q}}{{2 \times Mass\,A}}\]$

$\[\frac{{Mass\,Q}}{{Mass\,A}} = \frac{3}{2} \times \frac{{Mass\,Q}}{{Mass\,A}}\]$

From equation (i)

$\[\frac{{Mass\,Q}}{{Mass\,A}} = \frac{3}{2} \times 0.574\]$

$\[\frac{{Mass\,Q}}{{Mass\,A}} = 0.861\]$

Hence, the mass ratio (mass Q)/(mass A) for $\[{A_2}{Q_3}\]$ is $0.861$.