Determine the molarity of a solution formed by dissolving 97.7 g libr in enough water to yield 750.0 ml of solution.

a) 1.50 m
b) 1.18 m
c) 0.130 m
d) 0.768 m
e) 2.30 m

A. 1.50 M

Explanation:

Concentration is the number of moles of solute dissolved in a volume of 1 L of solution

Mass of LiBr - 97.7 g

Number of moles of LiBr - 97.7 g /87 g/mol = 1.12 mol

Equation for concentration is as follows

Concentration = number of moles / volume of solution in L

Substituting the values

Concentration = 1.12 mol / 0.7500 L

Concentration of LiBr is 1.50 mol/L

answer: the figure is attached herewith.

step-by-step explanation:   we are given to sketch a unit circle and label the terminal points corresponding to

in the attached figure, we have drawn a unit circle, with centre at o(0,0) and radius 1 unit. we have labelled the points a, b, c, d and e corresponding to the angles below

∠aox = 60°,

∠box = 120°,

∠cox = 180°,

∠dox = 240°,

∠eox = 300°.

and the coordinates are a(0.5,1), b(-0.5,1), c(-1,0), d(-0.5,-1) and e(0.5,-1).

thus, the answer is complete.