I think it will be B. Hope it helps :)
Answer:
Given
mass of solute (m) =20.5g
mass of solvent( ms) =155g
solution
malality =mX1000/mrxms
M=20.5x1000/62x155
M=2.1332
I think your answer is D. However I’m not 100% sure.
Answer:
It works because of the significant principle of piezoelectricity
Explanation:
6.21 x 10^3 = (Move decimal point 3 spaces to the right)
6210
6210 (0.1050)
652.05
