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Soloha48 [4]
4 years ago
11

HBr + KHCO3 --> H2O + KBr + CO2

Mathematics
1 answer:
Alekssandra [29.7K]4 years ago
3 0
The Bromium acid used in this is 30 grams. First, we need to convert it into mol so we can find out how much CO2 produced in mol unit.
The molecular weight for HBr would be 80.91g/mol, so the amount of HBr in mol would be: 30 gram/(80.91g/mol)= 0.37 mol

From the equation, you can conclude that for every 1 mol of HBr can produce 1 mol of CO2. The molecular weight for CO2 would be:12+ 16*2= 44g/mol. 
The amount of CO2 produced in grams would be: 1/1 * 0.37 mol* (44g/mol)= 16.31 grams
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Answer:

D. 8pi>24 cause this is the right answer

7 0
3 years ago
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Hunter-Best [27]

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Step-by-step explanation:

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f of x equals 4 x over quantity x squared minus 16. Show all work to identify the asymptotes and zero of the function.
yuradex [85]

Given:

The function is

f(x)=\dfrac{4x}{x^2-16}

To find:

The asymptotes and zero of the function.

Solution:

We have,

f(x)=\dfrac{4x}{x^2-16}

For zeroes, f(x)=0.

\dfrac{4x}{x^2-16}=0

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x=0

Therefore, zero of the function is 0.

For vertical asymptote equate the denominator of the function equal to 0.

x^2-16=0

x^2=16

Taking square root on both sides, we get

x=\pm \sqrt{16}

x=\pm 4

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3 years ago
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Anna35 [415]
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8 0
3 years ago
You are competing in a race. The table shows the times from last year's race. You want your time to be last year's median time w
olasank [31]

Answer:

  28 ≤  x ≤40

Step-by-step explanation:

Arrange the data from the smallest to the largest

26, 27, 28,32, 32, 33, 35, 36, 38, 40,42,48

Identify the median value

26, 27, 28,32, 32,<u> 33, 35</u>, 36, 38, 40,42,48

Getting the median

(33+35)/2   =  68/2  = 34 minutes

You want your time to be last year's median time with an absolute deviation of at most 6 minutes

This mean ±6 minutes, hence this will be 34 ± 6

34+6=40  and 34-6=28

The inequality will be    28 ≤  x ≤40

7 0
3 years ago
Read 2 more answers
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