A chemist starts with 1.75 g of dactylic acid and excess methanol and calculates the maximum possible yield to be 1.93 g After the reaction run the chemist finds that the amount of methyl salicylate produced and isolated is only 1.42 g What is percentage yield of the process ?

The percentage yield of the reaction = 73.6 %

Explanation:

Step 1: Data given

Mass of salicylic acid = 1.75 grams

the maximum possible yield = 1.93 g

The actual yield = 1.42 grams

Step 2: The balanced equation

C7H6O3 + CH3OH → C8H8O3 + H2O

Step 3: Calculate the percentage yield

Percentage yield = (actual yield / theoretical yield) * 100 %

Percentage yield = (1.42 grams / 1.93 grams ) * 100 %

Percentage yield = 73.6 %

The percentage yield of the reaction = 73.6 %

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.