Question

Screen Shot 2019-07-30 at 6.52.36 PM Screen Shot 2019-07-30 at 6.47.57 PM Search Search 3 attempts left Check my work 3 attempts lef Check my work 13 water at various A student measured the following data for the solubility of a compouno temperatures. The student prepared a graph graph. these data. Choose all the incorrect features of this Solve the following equations for x. Express all answers in decimal form. x=-0.28571 Solubility (a) 7x 6 4 2 points (b) 0.45/x 205 x0,9225 Solubilit Temperatur eBook 22 31 20. (c) x2-40-2 26 - Print 28. 39 References (d) 3x 13-x 37.2 44 x= 41.: 51 Screen Shot 2019-07-30 at 6.44.29 PM yaxis units are missing. 10 Grid lines should be uniformly labeled. There should be open circles instead of dots. t 769.0 torr and 24.0°C is 1.205 g/L The density of air axis maximum should be 60, not 120. The graph title is missing. points Part 1 out of 2 axis units and label are missing. f air. Calculate the average molar mas eBook "best fit" line should be used. The points should not be connected by lines. g/mol yaxis maximum should be 60, not 120. Print References uerosymussu 3 attempts left mmer2019.pdf Check my work

Answer 1

13) Incorrect features:

a) Y axis units are missing .

b) x axis maximum should be 60 not 120 to make graph more readable.

c) The graph title is missing.

d) x axis units and label are missing.

e) Always best fit line is used to join points.

3)(a) 7x + 6 =4

x = -0.28571 (already solved)

(b) 0.45 / x = 2.05

x = 0.45 / 2.05

=0.2195

(c) x² = 40 - x²

2x² =40

x = square root of 20

= +/- 4.47 (positive and negative 4.47 both possible)

(d) 3x = 13 -x

2x = 13

x= 6.5

(10) P V = n R T

n = m / M -----------------(moles / molar mass)

M = ?

putting n = m / M

P V = (m /M ) R T

P M = (m / V) R T

m/ V = density

M = (density x R x T )/ P

P = 769 / 760 = 1.012 atm

R = 0.0821

M = 1.205 x 0.0821 x 297 / 1.012

M = 29.034 g