If a sample of 0.150 g of kcn is treated with an excess of hcl, calculate the amount of hcn formed in grams.

The amount of Hcn formed in grams is = 0.06223 grams calculation

write the equation for reaction

that is; KCn + HCl → KCl + HCn

step 1:find the moles of KCn reacted

moles of KCn = mass of KCn/molar mass of KCn (65.12 g/mol)

= 0.150 g / 65.12 g/mol = 2.303 x10^-3 moles

step 2: use the mole ratio between KCn : HCn which is 1:1 to determine the moles of HCn which is also 2.303 x 10^-3 moles

step 3: find the mass of HCn = moles of HCn x molar mass of HCn

= 2.303 x10^-3 x 27. 02 = 0.06223 grams