Wednesday
November 26, 2014

Homework Help: CHEMISTRY

Posted by yellowone on Monday, April 23, 2007 at 10:48pm.

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.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - Zinc metal reacts with hydrochloric acid to produce hydrogen gas ...
chemistry - Zinc combines with hydrochloric acid to form aqueous zinc chloride ...
Chemistry - Zn+ 2HCl -> ZnCL2+h2 what volume of hydrogen at stp is produced ...
SCIENCE/CHEM - the purity of zinc is to be determined by measuring the amount of...
chemistry - Nitric acid and zinc react to form zinc nitrate, ammonium nitrate, ...
Chemistry - Phosphoric acid reacts with zinc to produce hydrogen gas and zinc ...
chemistry - Hydrogen gas is produced when zinc reacts with hydrochloric acid. if...
Chemistry - Al(s) + HCl(aq) AlCl3(aq) + H2(g) Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) ...
Chemistry - Equations - I am a student in the ninth grade and I need help with ...
Jefferson - Nitric acid and zinc react to form zinc nitrate, ammonium nitrate, ...

Search
Members