Where corey brick at

HI decomposes into its elements according to second-order kinetics. What concentration of HI remains from an initial concentrati

Novosadov [1.4K]

Answer:

Therefore (2.30-0.03747)= 2.2625 M of HI remains from an initial concentration of 2.30 M after 4.5 hours.

Step-by-step explanation:

second order reaction: The rate of reaction proportional to the square of the concentration of reactant.

For second order reaction

$k=\frac{x}{ta(a-x)}$

K is rate constant = 1.6×10⁻³M⁻¹hr⁻¹

a = initial concentration of reactant = 2.30 M

a-x = concentration of reactant after t h

t = time = 4.5 h

Putting the values in the above equation,

$1.6\times 10^{-3}= \frac{x}{4.5 \times 2.30 \times (2.30-x)}$

$\Rightarrow 16.56 \times 10^{-3}\times (2.30-x)= x$

$\Rightarrow 16.56 \times 10^{-3}\times 2.30-16.56 \times 10^{-3}\times x= x$

$\Rightarrow (1+16.56 \times 10^{-3}) x=16.56 \times 10^{-3}\times 2.30$

$\Rightarrow x = 0.03747$

Therefore (2.30-0.03747)= 2.2625 M of HI remains from an initial concentration of 2.30 M after 4.5 hours.

4 0

4 years ago

Which expressions below are equivalent to 43c+513 ? Select all that apply. □ A. 13(4c+16) □ B. 43(c+4) □ C. 13(33c+5) □ D. 23(2c

Viktor [21]

It's A because you need to distribute

4 0

4 years ago

Read 2 more answers

HELP ME PLEASE!!!!

djverab [1.8K]

Answer:

$1.75

Step-by-step explanation:

Divide 28$ by 16 pieces for 1.75 a piece

4 0

3 years ago

Read 2 more answers

Math test! i need help!

AnnZ [28]

Answer: B y ≤ -7

Step-by-step explanation:

First divide both sides of the inequality by -8 and flip the inequality sign.

-8y ➗ (-8) ≤ 56 ➗ (-8)

Any expression divided by itself equals 1

y ≤ 56 ➗ (-8)

Dividing a positive and a negative equals a negative

y ≤ -56 ➗ 8

Calculate the quotient

y ≤ -7

(Hope this helps!)

6 0

3 years ago

Please answer... I will mark you brainliest and please list steps of how to solve the problem

Kaylis [27]

Answer: (1: 70 degrees) (2: 110 degrees) (3: 35 degrees)

Step-by-step explanation:

For the first triangle, we know that the angles in total add up to 180 degrees. You already know two angles (40 and 70).

Let's, for now, label angle 1 as x.

40 + 70 + x = 180, since the sum of the angles add up to 180

110 + x = 180, no problems right?

110 - 110 + x = 180 - 110

x = 70

Now there's angle 2.

Let's label angle 2 as y.

We know angle 1 by now, and we should know that y + 70 = 180, since the two angles form a line together. A line is always 180 degrees.

y + 70 = 180

y + 70 - 70 = 180 - 70

y = 110

Now there's the last angle, angle 3

Let's label angle 3 as z

Repeating what we did for angle 1, we already know two angles (110 and 35)

110 + 35 + z = 180

145 + z = 180

145 - 145 + z = 180 - 145

z = 35

There you have it! The answer, but this was the long way. The short way is much simpler, but harder to teach without a one-on-one lesson.

Don't forget units!

8 0

3 years ago