Chemistry

When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyaninde (HCN) is given off. Here is the equation: KCN(aq) + HCl(aq) ----> KCl(aq)+ HCN(g)

If a sample of 0.140 g of KCN is treated with an excess of HCl, calculate the amount of HCN formed, in grams.

  1. 👍 0
  2. 👎 0
  3. 👁 113
asked by Ysay
  1. It appears that the mole ratio is 1:1 from the balanced equation.

    How many m oles of KCN is .140 grams?

  2. No indicated moles. :(

    1. 👍 0
    2. 👎 0
    posted by Ysay
  3. Give me a break. Calculate the moles. You have the mass, you know the formula, calculate the molmass of KCN

    moles=mass/molemassKCN

  4. In this question, we are asked to find the mass of HCN produced from 0.140 g of KCN. The mass of KCN will be converted to moles of KCN by dividing by its molar mass.

    From the balanced chemical equation, we will use the ratio of KCN and HCN to convert moles of KCN consumed into moles of HCN formed. The moles of HCN formed will be converted to grams by multiplying by the molar mass of HCN.

    0.140 g KCN * 1 mol KCN / 65.12 g KCN * 1 mol HCN / 1 mol KCN * 27.03 g HCN / 1 mol HCN = ____g HCN

    1. 👍 0
    2. 👎 0
    posted by Person

Respond to this Question

First Name

Your Response

Similar Questions

  1. General Chemistry

    3.71 When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCl(aq) -> KCl(aq) + HCN(g) If a sample of 0.140 grams of KCN is treated with an

    asked by Kendra on May 24, 2010
  2. General Chemistry

    When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCI(aq) -> KCI(aq) + HCN (g) In a sample of 0.140 grams of KCN is treated with an excess

    asked by Kendra on May 26, 2010
  3. chemistry

    Potassium cyanide (KCN) reacts with acids to produce the poisonous hydrogen cyanide gas, HCN, according to the reaction below: KCN(aq) + HCl(aq) = HCN(g) + KCl(aq) If a sample of 0.653 g of KCN is placed in an excess of HCl, how

    asked by Kara on October 3, 2011
  4. chemistry

    Assume that you have 2.75 g of the deadly gas hydrogen cyanide,HCN. What is the volume of the gas at STP?

    asked by Christy on November 7, 2011
  5. Chemistry

    Below are 2 word equations. For each, identify the type of equation and write a chemical equation with symbols for the word equation. (I have solved the equations but I am not sure what the question means by ``type of equation``)

    asked by Anonymous on September 8, 2015
  6. Chem

    Concerning compounds cyanogen, Hydrogen cyanide and sodium cyanide. Cyanogen = C2N2 (CN)2 Hydrogen Cyanide = HCN boils at 26C and yeilds an acid solution when added with water. Sodium Cyanide = empirical formula NaCN is a solid

    asked by Lacey on March 6, 2007
  7. Chem

    Concerning compounds cyanogen, Hydrogen cyanide and sodium cyanide. Cyanogen = C2N2 (CN)2 Hydrogen Cyanide = HCN boils at 26C and yeilds an acid solution when added with water. Sodium Cyanide = empirical formula NaCN is a solid

    asked by Lacey on March 6, 2007
  8. chemistry

    Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the following reaction. CH4(g) + NH3(g) → HCN(g) + 3 H2(g) What is the heat of reaction at constant pressure? Use the following thermochemical

    asked by caroline on October 29, 2010
  9. Chemistry

    Hydrogen cyanide is a highly poisonous, volatile liquid. It can be prepared by the following reaction. CH4(g) + NH3(g) → HCN(g) + 3 H2(g) What is the heat of reaction at constant pressure? Use the following thermochemical

    asked by Emily on October 31, 2010
  10. Chemistry

    Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. If 50.0 mL of hydrogen gas is produced at STP, what is the mass of potassium that reacted? 2K(s) + 2 H2O (l) -> 2 KOH (aq) + H2(g)

    asked by BR on May 11, 2015

More Similar Questions