Top Posters
Since Sunday
e
5
R
5
e
4
4
d
4
o
3
p
3
t
3
3
m
3
p
3
m
3
New Topic  
OldSpice OldSpice
wrote...
Posts: 6432
9 years ago
What is the formula for hydroxyapatite, which is found in tooth enamel and is the hardest substance in the human body?
A) CaF2
B) Ca3(PO4)2
C) Ca10(PO4)6F2
D) Ca10(PO4)6(OH)2
E) none of the above
Read 224 times
3 Replies
Replies
Answer accepted by topic starter
ElectricElectric
wrote...
Top Poster
Posts: 6431
9 years ago
Sign in or Sign up in seconds to unlock everything for free
1
.silent.boss

Related Topics

OldSpice Author
wrote...
9 years ago
Perfect!

..Thank you so much for your support
wrote...
9 years ago
My pleasure
.silent.boss
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  989 People Browsing
Related Images
  
 304
  
 1493
  
 177
Your Opinion
Which industry do you think artificial intelligence (AI) will impact the most?
Votes: 378

Previous poll results: What's your favorite math subject?