Answer:
C
Step-by-step explanation:
Using the sine ratio in the right triangle.
sinC = = = , thus
∠ C = ( ) ≈ 34.85° ( to 2 dec. places )
Point-slope form: y+2=-2(x-4)
Your molarity would be 0.975 M HCl because it’s moles of solute divided by liters of solvent
(2×1+2)+(2×2+2)+(2×3+2)+(2×4+2)
=28