Two chemicals A and B are combined to form a chemical C. The rate, or velocity, of the reaction is proportional to the product of the instantaneous amounts of A and B not converted to chemical C. Initially, there are 100 grams of A and 50 grams of B, and for each gram of B, 2 grams of A is used. It is observed that 10 grams of C is formed in 7 minutes. How much is formed in 28 minutes? (Round your answer to one decimal place.) grams What is the limiting amount of C after a long time? grams How much of chemicals A and B remains after a long time? A grams B grams At what time is chemical C half-formed? t = min

Follows are the solution:

Explanation:

A + B = C

Its response decreases over time as well as consumption of a reactants.  

r = -kAB

during response A convert into 2x while B convert into x to form 3x of C

let's  y = C

y = 3x

Still not converted sum of reaction  

for A: 100 - 2x

for B: 50 - x

Shift of x over time  

Integration of x as regards t  

D is the constant of integration

initial conditions: t = 0, x = 0

hence we get:

after t = 7 minutes ,

Insert the above value x into equation to get k.  

therefore plugging in the equation the above value of k  

Let y = C

, calculate C:

y = 3x

amount of C formed in 28 mins

plug t = 28

therefore amount of C formed in 28 minutes is = 3x = 144.78 grams

C:

y= 136.5 =137

no

explanation:

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the correct answer would be d. hope this !