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2 years ago

9

calculate the pH of a solution prepared by dissolving 1.75g of acetate, CH3COONa, in 60.5mL of 0.25M acetic acid, CH3COOH(aq). A

ssume the volume change upon dissolvin the sodium acetate is negligible. Ka of CH3COOH is 1.75 x 10^-5

1 answer:

pentagon [3]2 years ago

4 0

Answer:

PH= 5.00

Step-by-step explanation:

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Write a number that has four digits with the same number in all places,such as 4,444. Circle the digits with the greatest value.

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first 3 nines have the greater value but the first one has the highest and the least one is the last nine.

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3 years ago

Find the point of intersection (if any) of the following pairs of lines: a) x – 2y +1=0 2x + 3y – 7 = 0 b) x-2y+11=0 -x+2y-13 =

pychu [463]

Answer:

a) (11/7, 9/7)

b) There's no point of intersection

Step-by-step explanation:

a) x - 2y + 1 = 0

2x + 3y - 7 = 0

To find the point of intersection, we need to solve the system of equations and the result will be the point of intersection (x,y)

$x-2y+1=0\\x= 2y-1$

Now we substitute x in the second equation:

$2x+3y-7=0\\2(2y-1)+3y-7=0\\4y-2+3y-7=0\\7y-9=0\\y=9/7$

Now we substitute y in our first equation.

$x-2y+1=0\\x-2(9/7)+1=0\\x-18/7+1=0\\x=18/7-1\\x=11/7$ .

The point of intersection is (11/7, 9/7)

b) x -2y +11 =0

-x + 2y - 13 =0

We are going to follow the same procedure:

$x-2y+11=0\\x=2y-11$

$-(2y-11)+2y-13=0\\-2y+11+2y-13=0\\0y=2\\0=2$

Since this system of equations doesn't have a solution, the system has no point of intersection.

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2 years ago

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3 years ago

A sequence can be represented by the formula t(n)=6; t(n+1)=3*t(n). write the first 4 terms of the sequence. what would be an ex

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Answer:

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Step-by-step explanation:...

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2 years ago

4/3 b + 2 equals 4 - 1/3 be

DIA [1.3K]

I do not understand what you are asking but I am going to assume that you are trying to simplify the equation.

First, write the equation.

(4/3)b + 2 = 4 - (1/3)b

Add (1/3)b to each side.

(5/3)b + 2 = 4

Subtract 2 on each side.

(5/3)b = 2

Divide by (5/3) on each side

b = 1.2

b = 1.2 is your final answer.

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2 years ago

Read 2 more answers