Answer:
676 g
Explanation:
First, let's calculate the area of the rug: 3.70x4.20 = 15.54 m². Knowing that 1 yard has 0.9144 m, so
1 yd² = (0.9144 m)² = 0.8361 m²
So, there is 30.0 oz in 0.8361 m²
30.0 oz-----------------0.8361 m²
x -----------------15.54 m²
By a simple direct three rule:
0.8361x = 466.2
x = 557.6 oz of Acrilan in the rug
1 oz = 28.35 grams, so 557.6 oz = 15807.96 g
The potencial of HCN is 50.9% of this mass, so: 0.509x15807.96 = 8046.25 g.
But only 42.0% of the rug is burned, so the potencial of HCN is 42.0% of 8046.25: 0.42x 8046.25 = 3379.42 g.
And the yield is only 20.%, so the mass formed of HCN is:
0.20x3379.42 = 676 g
