Question

A composite figure is shown.

A five-sided figure with two parallel sides. The shorter one is 43 centimeters. The height of the figure is 34 centimeters. The portion from the vertex to the perpendicular height is 21 centimeters. The portion from a point to a vertical line created by two vertices is 16 centimeters.

Which of the following represents the total area of the figure?

Answer 1

The balanced chemical equation for the reaction is:

SrCl2(aq) + 2NaF(aq) ⟶ SrF2(s) + 2NaCl(aq)

To find the volume of a 0.550 M NaF solution required to react completely with 675 mL of a 0.680 M SrCl2 solution, we can use the following steps:

1.Calculate the moles of SrCl2 present in 675 mL of a 0.680 M solution:

moles of SrCl2 = (0.680 mol/L) x (0.675 L) = 0.459 mol

2.Use the mole ratio from the balanced chemical equation to calculate the moles of NaF required to react with all of the SrCl2:

moles of NaF = (2 mol NaF / 1 mol SrCl2) x (0.459 mol SrCl2) = 0.918 mol NaF

3.Calculate the volume of a 0.550 M NaF solution required to contain 0.918 moles of NaF:

volume of NaF solution = (0.918 mol) / (0.550 mol/L) = 1.67 L

Therefore, 1.67 L of a 0.550 M NaF solution is required to react completely with 675 mL of a 0.680 M SrCl2 solution.

I hope this helps! Let me know if you have any other questions.