The answer should be 261.97 g/mol
Answer:
kindly, find the attached image to see the structure for 2-amino -4-(1,2-dimethyl propyl )-3-hydroxy -7-oxo hept –3-en-5-yn-1-oic acid.
I believe its B from what i remember in biology class
Evaporation is used to separate a soluble solid from a liquid. For example, copper sulfate is soluble in water – its crystals dissolve in water to form copper sulfate solution. During evaporation, the water evaporates away leaving solid copper sulfate crystals behind.
Number of moles :
n = mass solute / molar mass
n = 20 / 18
n = 1.111 moles
Therefore:
Molarity = moles solute / volume
Molarity = 1.111 / 30 => 0.37 M