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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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jgarcia365 jgarcia365
wrote...
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10 years ago
The color observed when heating elements in a high temperature flame is due to:
   
A.     Accelerated electrons
B.    Accelerated neutrons
C.   Accelerated protons
D.    Accelerated atoms
E.   None of the above


Which of the following are chemical component(s) of biological buffer systems?

A.   Phosphate only
B.    Bicarbonates and phosphates only
C.    Bicarbonates and amino acids only
D.    Bicarbonates, phosphates and amino acids
E.   None of the above
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wrote...
#1
Subject Expert
10 years ago
Hi jgarcia365,

Quote
The color observed when heating elements in a high temperature flame is due to:
I believe it's due to electrons absorb energy to get to excited state then release energy to go back to the ground state. The releasing energy accounts for the color of metals when you heat them.
It's either A or E; I would go with A

Quote
Which of the following are chemical component(s) of biological buffer systems?
I believe it's B; bicarbonate and phosphates are the main players. Amino acids (I'm thinking histidine) might play a role in the buffer but its concentration in the extracellular, if there are some, is negligible.

Best,
Laser
jgarcia365 Author
wrote...
#2
10 years ago
Quote from: Laser_3 (10 years ago)
Hi jgarcia365,

Quote
The color observed when heating elements in a high temperature flame is due to:
I believe it's due to electrons absorb energy to get to excited state then release energy to go back to the ground state. The releasing energy accounts for the color of metals when you heat them.
It's either A or E; I would go with A

Quote
Which of the following are chemical component(s) of biological buffer systems?
I believe it's B; bicarbonate and phosphates are the main players. Amino acids (I'm thinking histidine) might play a role in the buffer but its concentration in the extracellular, if there are some, is negligible.

Best,
Laser

thankyou
wrote...
#3
10 years ago
A and B are the respective answers. Slight Smile
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