Question

Potassium cyanide is a toxic substance, and the median lethal dose depends on the mass of the person or animal that ingests it. The median lethal dose of KCN for a person weighing 185 lb (83.9 kg ) is 8.50×10−3 mol . What volume of a 0.0320 M KCN solution contains 8.50×10−3 mol of KCN?

Answer 1

thank you vmuch....

we have Molarity = moles I volumen L Given moles = 8.50X1*3mal Molarity = 0.0320M, ... 0.0320 - 8.50X10-3 Volume in L Volume in La 8.50X10 3 0.0320 = 0.2656L .. o volume = 265.6ml,

Answer 2

Gastric acid pH can range from 1 to 4, and most of the acid is HCl$\mathrm{H}\mathrm{C}\mathrm{l}$.

For a sample of stomach acid that is 2.72×10⁻² M$\mathit{M}$ in HCl$\mathrm{H}\mathrm{C}\mathrm{l}$, how many moles of HCl$\mathrm{H}\mathrm{C}\mathrm{l}$ are in 17.6 mL$\mathrm{m}\mathrm{L}$ of the stomach acid?

Express the amount to three significant figures and include the appropriate units.