# Chemistry

Find the mininum ammount of 5.0 M HNO3 needed to dissolve 2.72 g of Cu (s). I have the balanced equation here:

2NO3-(aq)+8H+(aq)+3Cu(s)-->2NO(g)+4H2)(l)+3Cu2+(aq)

Obviously it is a 2 moles NO3- to 3 moles of Cu (s) ratio. I converted grams Cu to moles (0.04280)), then multiplied by 2/3 (ratio of NO3- to Cu) which gave me moles of NO3- (0.02853). I then solved for the volume required by dividing those moles by 5.0 M, however when I submit the answer I is not correct. Can anyone see my error? The answer I am getting is 5.7 mL.

1. 👍 0
2. 👎 0
3. 👁 181
1. You have balanced the redox part.
The molecular equation is
8HNO3 + 3Cu ==> etc
Try that and get back either way, please.

1. 👍 0
2. 👎 0
posted by DrBob222
2. Yes you were correct, it is an 8/3 ratio. Thanks Dr. Bob!!

1. 👍 0
2. 👎 0
posted by Phat Pat

## Similar Questions

1. ### CHEMISTRYY!

Determine if HNO3 can dissolve in the following metal: 1) Write a balanced chemical reaction showing how the 2.09g Cu dissolves in HNO3. I had put down: Cu(s) + 4HNO3(aq) ——> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l) but it's wrong. 2)

asked by Lisa on March 31, 2013
2. ### Chemistry

A student performing an experiment mistakenly used 8.0 ml of 16 M HNO3 to dissolve 0.16g of solid copper instead of the 4.0 ml as suggested. how many moles of HNO3 remains after the reaction with copper is complete. 8 moles of

asked by Anonymous on September 29, 2016
3. ### Chemistry

How many mL of a 0.5M Ca(OH)2 solution are needed to neutralize 38 mL of a 2M HNO3 solution? ANSWER IS: x = multiply / = divide 38mL HNO3 X 1 L HNO3 x 2M HNO3 x 1 L Ca(OH)2 x 2M Ca(OH)2 x 1000 mL / 1000 mL/1L HNO3/..5mL Ca(OH)2/1M

asked by ChemistryAngel on May 1, 2016
4. ### CHEM

Will you please tell me if these are right? Write the symbol of the caton or anion that give(s) the following reaction:? 1. Forms a precipite with AgNO3 that does not dissolve in HNO3 2. Forms a gas with HCl 3. Give a bright,

asked by Jason on November 7, 2010
5. ### programming

write the c programe to find the simple intrest of amount which is supplied by user with the rate of 3% if ammount 10,000 for 5 years.

asked by puja on November 28, 2014
6. ### Chemistry

Are the following True or False? If false, explain why. (I put what I think the answers are below each question) 1) Iron metal will reduce Fe3+ to Fe2+ (False because Fe3+ is more stable than Fe2+?) 2) Copper metal will dissolve

asked by Anonymous on November 30, 2015
7. ### chemistry

How many mL of 0.716 M HNO3 are needed to dissolve 7.67 g of MgCO3? 2HNO3(aq) + MgCO3(s) Mg(NO3)2(aq) + H2O(l) + CO2(g)

asked by kammy on March 3, 2014
8. ### physics

ok a person is holding onto a piece of string at the end of the string is a ball the person whrils it around in a circle i've been asked what's the mininum value of at the top of the circle (this is swung around in a verticle

asked by physics on August 11, 2009
9. ### Chemistry

How many mL of concentrated HNO3 (conc. HNO3 is 16 Molar)will be needed to make 1.25 Liters of 9 Molar HNO3?

asked by Anonymous on December 5, 2012
10. ### Chemistry

Given the reaction: 3 Cu + 8 HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O If 12.0 moles of copper react, how many grams of HNO3 are needed?

asked by Jessica on January 30, 2019

More Similar Questions