# General Chemistry

A 0.1358g zinc metal reacts completely with Dil HCL to produce 52.20ml of H2(g) at 22.0 degrees Celsius. The hydrogen gas is collected over water at 22.0 degree Celsius and a barometric pressure of 755 mm Hg. The water vapor pressure at 22.0 degrees Celsius is 19.8 mm Hg and the height of water column in the gas collecting tube is 12.0 cm (the density of mercury is 13.6 g/ml)

a. Write a balanced equation for the reaction of zinc metal with Dil HCl.
Zn(s)+2HCl(aq)-->ZnCl2(aq)+H2(g)

b. Calculate the number of moles hydrogen gas produced from the mass of Zn(s) given above.
0.1358g Zn (1 mole Zn) (1 mole H)
---------- -----------
65.39g Zn 1 mole Zn
= 0.002077 moles of Hydrogen

c. What is the partial pressure of hydrogen gas expressed in mm Hg? Hint: Apply Dalton's Law of Partial Pressure.
P atompsheric= P hydrogen gas + P water vapor + P height of water column
P= 755torr-19.8torr-120mmHg(1mmHg/13.6)
= 726mm Hg

d. Calculate the ideal gas constant, R, in units of L*atm/mol*K
PV=nRT
R=PV/nT
I can solve the problem but what do I plug in for 'P'? Is it 755?

1. 👍 0
2. 👎 0
3. 👁 350
1. No. According to your numbers it would be 726/760 atm.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Chemistry

In the following chemical reaction between H2 and Cl2 to produce HCl, what is the mass of HCl produced with 0.35g of H2 completely reacts with 12.42g of Cl2?

asked by Anonymous on February 15, 2017
2. ### Ap chemistry

how many milliliters of a 0.46 M HCl solution are needed to react completely with a 6.4 g of zinc to form zinc (ii) chloride answer in mL Help please :( I was absent and don't know where to start

asked by Chasm on September 10, 2012
3. ### Chemistry Balancing Equations

Can you please tell me if these are correct? 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride NaHSO3 + HCl -----> SO2 + H2O + NaCl 2. Sodium nitrate reacts with

asked by Anonymous on March 14, 2011
4. ### chem

A 0.069 gram sample of a metal reacted with HCl and produced 45.31 mL of H 2 gas at 25¡ÆC and 1 atm pressure. The metal is known to react with HCl according to the following reaction, 2 M + 6 HCl > 2 MCl 3 + 3 H 2 What is the

asked by jhon on October 31, 2014
5. ### Chemistry

When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen was collected over water at 10 degress C The external pressure was 737.7 Torr. a) What volume would the dry hydrogen occupy at 1.00 atm and

asked by Sandy on December 13, 2012

1.Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) -> 6H2O(g) +

asked by John on April 22, 2015
2. ### Chemistry HW Need answers

1.Cell respiration glucose is reacted wth oxygen in body to produce carbon dioxide and water how many liters of carbon dioxide would be produced if 90.0 g of glucose completely reacts with oxygen C6H12O6(s)+ 6O2(g) -> 6H2O(g) +

asked by John on April 22, 2015
3. ### chemistry

A piece of zinc reacts completely with hydrochloric acid, HCl(aq), to produce an aqueous solution of zinc chloride, ZnCl2(aq), and hydrogen gas. a. Use the data shown below to determine the enthalpy of reaction per mole of zinc.

asked by anonymous on September 26, 2019
4. ### Chemistry

How many grams of solid zinc metal will completely react with 100.0 mL of 0.0525 M HCl, if zinc chloride and hydrogen gas are the only products?

asked by Anonymous on April 13, 2015
5. ### chemistry

1- A compound is 87.5% nitrogen and 12.5% hydrogen. The molecular weight of the compound is 32 g/mol. Describe the molecule referencing shape, and inter-molecular forces. 2- Gaseous butadiene, C4H6 , reacts with hydrogen gas in

asked by Katie on January 6, 2014
6. ### chemistry

All of the lanthanide metals react with HCl to form compounds having the formula MCl2,MCl3,or MCl4 (where M represents the metallic element). Each metal forms a single compound. A chemist has .250g sample of a transition metal,

asked by T on February 9, 2011