Question
Asked Oct 15, 2019
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The LD50 of KCN for a 75kg person is 375mg. If this amount of KCN was put into a single cup (275mL) of coffee, what would be the concentration of the KCN in moles per liter? 

5.92
Question 2
1 pts
The LD50 of KCN for a 75kg person is 375mg. If this amount of KCN was put
into a single cup (275mL) of coffee, what would be the concentration of the
KCN in moles per liter?
No answer text provided.
0.733
1.36
0.0209
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5.92 Question 2 1 pts The LD50 of KCN for a 75kg person is 375mg. If this amount of KCN was put into a single cup (275mL) of coffee, what would be the concentration of the KCN in moles per liter? No answer text provided. 0.733 1.36 0.0209 Submit Ouiz No new data to save Last checked at 5:24pm 45 AGES

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Expert Answer

Step 1

Given:

The median lethal dose of the of potassium cyanide is 375mg for 75kg person.

Volume of a single cup = 275ml

Step 2

 

Molecular weight of KCN= weight of (C+N+K)

                                         = (12+14+39)g

                                         = 65g   

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given weight of KCN no of moles of KCN= molecular weight of KCN 375 65 = 5.769 moles

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Step 3

 

To calculate the concentr...

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moles molarity volume (in litre) 5.769 moles 275 -L 1000 5.769 moles 275 L 20.978M

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