CHEMISTRY

how many grams of zinc are required to react with excess acid to make one liter of hydrogen at STP?

i have no clue how to go about this i need help

Write the balanced equation.
Zn + 2HCl ==> ZnCl2 + H2

2. Use PV = nRT to convert 1 L H2 gas to mols OR take the shortcut knowing that 1 mol of a gas occupies 22.4 L at STP.

3. Use the equation to convert mols H2 to mols Zn.

4. Then convert mols Zn to grams Zn.
g Zn = mols Zn x atomic mass Zn.

  1. 👍 0
  2. 👎 0
  3. 👁 156

Respond to this Question

First Name

Your Response

Similar Questions

  1. Jefferson

    Nitric acid and zinc react to form zinc nitrate, ammonium nitrate, and water. 4Zn(s) + 10HNO3(aq)→ 4Zn(NO3)2(aq) + NH4NO3(aq) + 3H2O(l) A. How many atoms of zinc react with 1.49g HNO3? B. Calculate the number of grams of zinc

    asked by Gloria on January 7, 2013
  2. chemistry

    Nitric acid and zinc react to form zinc nitrate, ammonium nitrate, and water. 4Zn(s) + 10HNO3(aq) → 4Zn(NO3)2(aq) + NH4NO3(aq) + 3H2O(l) A. How many atoms of zinc react with 1.49g HNO3? B. Calculate the number of grams of zinc

    asked by Anonymous on January 7, 2013
  3. chemistry

    Zinc reacts with hydrochloric acid according to the following equation: Zn + 2HCl --> ZnCl2 + H2 If 3.63 grams of zinc react, how many grams of zinc chloride is produced?

    asked by beryl on May 22, 2012
  4. chemistry

    2.56 grams of zinc react with excess phosphoric acid to produce how many molecules of hydrogen gas?

    asked by chris on March 8, 2015
  5. Chemistry

    How many grams of hydrochloric acid are required to react completely with 4.30 grams of zinc? I got 4.80g HCl for the answer but do not know how to do part 2 which is, How many molecules of a gas will be produced? Thanks.

    asked by lucy on October 21, 2007
  6. Chemistry

    Zinc and sulfur react to form zinc sulfide according to the equation Zn+S=>ZnS a) How many grams of ZnS will be formed? b) How many grams of the excess reactant will remain after the reaction is over?

    asked by Annie on March 8, 2012
  7. Chemistry

    I'm not sure how to do these...I keep getting the wrong answers... Please help someone... Mg(s) + 2 HCl(aq)= MgCl2 (aq) + H2(g) a. What volume of 15.7 M hydrochloric acid will react with 2.1 grams of Mg? b. What mass of magnesium

    asked by Ava on April 15, 2016
  8. Chemistry-Gases

    A common laboratory preparation of hydrogen on a small scale uses the reaction of zinc with hydrochloric acid. Zinc chloride is the other product. (a) If 13.0 L of H2 at 765 torr and 20.0 °C is wanted, how many grams of zinc are

    asked by Anonymous on April 2, 2014
  9. Chemistry

    can someone check my answers thank you. 1)How many grams of hydrochloric acid are required to react completely with 4.30 grams of zinc? answer: 0.1328 g H2 2)How many molecules of gas will be produced? answer: 0.395x10^23

    asked by Mike on January 10, 2008
  10. Chemistry

    here is the equation:Zn(s)+2HCl(aq)-->ZnCl2(aq)+H2(aq).If 20.0 moles of zinc react with excess hydrochloric acid. how many moles of zinc chloride are produced?....thxxx

    asked by Pierrysen on May 28, 2010

More Similar Questions