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polet [3.4K]
3 years ago
13

Can someone help me with this task please please !!!!

Mathematics
1 answer:
ICE Princess25 [194]3 years ago
7 0
Okay but fist did u read when it says “look back” go to the first page and take a photo to
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The rate constant for this first‑order reaction is 0.740 s − 1 0.740 s−1 at 400 ∘ C. 400 ∘C. A ⟶ products A⟶products How long, i
sesenic [268]

Answer:

1.668 S

Step-by-step explanation:

We are given that

A\rightarrowProduct

For first order reaction,

t=\frac{1}{k}ln\frac{A_0}{A}

t=\frac{2.303}{k}log\frac{A_0}{A}

Rate constant=k=0.740s^{-1}

Temperature=T=400^{\circ}

We have to find the time taken by the reaction when concentration of A to decrease from 0.790 M to 0.230 M.

A_0=0.79 M

A=0.230

Substitute the values then we get

t=\frac{2.303}{0.740}log\frac{0.79}{0.23}

t=1.668 s

Hence, it would take 1.668 s for the concentration of  A to decrease from 0.790 M to 0.230 M.

4 0
4 years ago
5m - 2 ≤-14 or -2m ≤ -15
Vera_Pavlovna [14]

the solution for the inequalities 5m - 2 ≤-14 or -2m ≤ -15 is m ≤ - 2.4 or m ≥ 7.5.

First inequality:

5m - 2 ≤ - 14

Add 2 to both the sides:

5 m - 2 + 2 ≤ - 14 + 2

5 m ≤ - 12

Divide both sides by 5:

5 m / 5 ≤ - 12 / 5

m ≤ - 2.4

Other inequality:

-2m ≤ -15

Divide both sides by 2:

-m ≤ -7.5

m ≥ 7.5

So, we get:

m ≤ - 2.4 or m ≥ 7.5

Therefore, we get that, the solution for the inequalities 5m - 2 ≤-14 or -2m ≤ -15 is m ≤ - 2.4 or m ≥ 7.5.

Learn more about inequalities here:

brainly.com/question/25275758

#SPJ9

Your question was incomplete, Please refer the content below:

Solve the inequalities:

5m - 2 ≤-14 or -2m ≤ -15

4 0
1 year ago
Find the inverse of the function.
skad [1K]

Answer:

x3 over 64+3x^ over 8+3x+8

Step-by-step explanation:

7 0
3 years ago
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(a-b) ( a+b) simplify​
BlackZzzverrR [31]

Answer:

a^2 - b^2

Step-by-step explanation:

1. (a)(a)+(a)(b)+(-b)(a)+(-b)(b)

2. a^2 + ab - ab - b^2

3. a^2 - b^2

4 0
3 years ago
Please help me! I’ll mark as brilliant
IrinaVladis [17]

Answer: 30 i believe

Step-by-step explanation:

3 0
3 years ago
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