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2 years ago

Pleaseeee Answer! Will Mark as Brainliest for the Best Answer

Mathematics

2 answers:

mars1129 [50]2 years ago

5 0

Answer:

$p^{4} s^{5} y^{-7} z^{-1}$

Step-by-step explanation:

$\frac{1}{y^{7} } = y^{-7}$

$\frac{1}{z} = z^{-1}$

Ede4ka [16]2 years ago

4 0

P^4 s^5 y^-7 z^-1
................................

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A mixture of compounds X and Y in a 0.100-cm cell had an absorbance of 0.215 at 272 nm and 0.191 at 327 nm. Find [X] and [Y] in

Oksi-84 [34.3K]

Answer: The concentration of X is $7.13582\times 10^{-6}$ and the concentration of Y is $2.53159\times 10^{-5}$ .

Step-by-step explanation:

Since we have given that

At 272 nm, absorbance = 0.215

At 327 nm, absorbance = 0.191

As we have given that

Compound X Compound Y

272 16400 3870

327 3990 6420

So, our equations becomes

$16400C_1+3870c_2=0.215\\\\3990C_1+6420C_2=0.191$

By solving these two equations, we get that

$C_1=7.13582\times 10^{-6}\\\\C_2=2.53159\times 10^{-5}$

Hence, the concentration of X is $7.13582\times 10^{-6}$ and the concentration of Y is $2.53159\times 10^{-5}$ .

5 0

3 years ago

I think of a number multiply by two then subtract 9

EastWind [94]

Answer:

2n - 9

Step-by-step explanation:

Let the number be n. Then "a number multiply by two then subtract 9" yields

2n - 9

3 0

3 years ago

4b + 5b I'm not sure if I did it right

n200080 [17]

It’s 9b it’s just 4+5 with the b

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3 years ago

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What is 31×15-11+40 =

Vedmedyk [2.9K]

Answer:

494

Step-by-step explanation:

You can use Symbolab to solve equations of all types with explanations

3 0

3 years ago

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Help (the answer isn't the 3rd one my friend did this test and chose that and got it wrong please )

Arturiano [62]

Answer:

3 and 1/3

Step-by-step explanation:

It is 3 and 1/3 because there are 3 fully shaded circles (3) then one of the three parts for one circle (1/3)

If it was wrong there is something wrong with the test lol.

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2 years ago

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