Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
ritznca ritznca
wrote...
Posts: 52
Rep: 0 0
11 years ago
A popular classroom demonstration consists of filing notches into a new penny and soaking the penny in hydrochloric acid overnight. Since new pennies are made of zinc coated with copper, and since hydrochloric acid dissolves zinc and not copper, the inside of the penny is dissolved by the acid, while the outer copper shell remains. Suppose the penny contains 1.5  of zinc and is soaked in 40.0 ml of 6.0 M HCl .
Read 313 times
1 Reply
Replies
Answer accepted by topic starter
toni_malvinatoni_malvina
wrote...
11 years ago
Sign in or Sign up in seconds to unlock everything for free
This verified answer contains over 140 words.
1

Related Topics

New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  855 People Browsing
 101 Signed Up Today
Related Images
  
 142
  
 113
  
 289
Your Opinion
Which 'study break' activity do you find most distracting?
Votes: 741