Which pair of amino acids can form hydrogen bonds between their R ...

[CQXA]

Which pair of amino acids can form hydrogen bonds between their R groups?
 
  A) arginine and glutamate
  B) aspartate and lysine
  C) leucine and alanine
  D) glutamine and serine
  E) glycine and asparagine

Question 2

What is the concentration of NO3- ions in a solution prepared by dissolving 25.0 g of Ca(NO3)2 in enough water to produce 300. mL of solution?
 
  A) 0.254 M
  B) 0.508 M
  C) 0.672 M
  D) 1.02 M

[k.lashomb]

Answer to Question 1

D

Answer to Question 2

D

[CQXA]

Great answer, keep it coming

[vickyvicksss]

Thanks for the timely response, appreciate it