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erica [24]
3 years ago
7

In a first-order decomposition reaction. 52.3% of a compound decomposes in 8.6 min. How long (in min) does it take for 80.3% of

the compound to decompose? Enter to 2 decimal places.
Mathematics
1 answer:
rusak2 [61]3 years ago
7 0

Answer:

13.20 min

Step-by-step explanation:

Rate of the reaction is a measure of the rate of decomposition of the compound.

Rate (R) = Concentration (C) ÷ time (t)

C1/t1 = C2/t2

C1 = 52.3% = 0.523

t1 = 8.6 min

C2 = 80.3% = 0.803

t2 = C2t1/C1 = 0.803×8.6/0.523 = 13.20 min (to 2 decimal places)

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levacccp [35]

Answer:

P(x>12) = 0

Step-by-step explanation:

Given

x = \{1,2,3,4,5,6,7,8,9,10,11,12\} --- outcomes

n(x) = 12 -- sample size

Required

P(x > 12)

This is calculated as:

P(x > 12) = \frac{n(x > 12)}{n(x)}

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So:

P(x > 12) =\frac{0}{12}

P(x>12) = 0

6 0
3 years ago
Ms. Posillico shoes are in ratio of 6:2:3:4; Wedges, Stilettos, Sneakers, Sandals respectfully. She owns 18 pairs of wedges. How
Aleksandr [31]

6:2:3:4

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5 0
3 years ago
the length of a rectangle is 2 in more than it's w i d t h the area of a rectangle is equal to 1 inch less than three times a pe
Marizza181 [45]
If we let x and y represent length and width, respectively, then we can write equations according to the problem statement.
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This can be solved a variety of ways. I find a graphing calculator provides an easy solution: (x, y) = (13, 11).

The length of the rectangle is 13 inches.
The width of the rectangle is 11 inches.

______
Just so you're aware, the problem statement is nonsensical. You cannot compare perimeter (inches) to area (square inches). You can compare their numerical values, but the units are different, so there is no direct comparison.

6 0
3 years ago
PLEASE HELP!!!!!!!!!!!!1
skelet666 [1.2K]
A. Let x = cheese and
y = chocolate
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x + y = 20

B. Subtract the second equation from the first.
2x + y = 25
-(x + y = 20)
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x = 5

Plug 5 back in to the second equation and solve for y.
x + y = 20
5 + y = 20
Subtract 5 from both sides.
y = 15
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Used elimination method because coefficients on the y values were both 1 so it was easy to subtract the equations and eliminate the y variable.


5 0
3 years ago
9 times the sum of 8 and y​
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