After dipping the litmus paper strips in the solutions, the answer to the question is that one is acidic because according to brad's observation on turned red and the others are basic or alkaline with the two papers turning blue.
Answer:
260.52 g
Explanation:
The Molar Mass of Angelic Acid ( C5H8O2) is 100.2g/mol, so if we multiply the molar mass by 2.6 mols, we should get 260.52g.
As i am reading the problem, i notice they give two concentrations (M), a volume and asking for the other volume; this should be a hint that we need to use the dilution formula---> M1V1 = M2V2
M1= 2.55 M
V1= ?
M2= 0.75 M
V2= 125 mL
now, we plug in the values into the formula
(2.55 x V1) = (0.75 x 125)
<span>V1= 36.8 mL</span>
