3 years ago

What is the main function of the circulatory system?

Chemistry

2 answers:

likoan [24]3 years ago

4 0

B- is the answer

Hope this helps

Have a nice day~

kati45 [8]3 years ago

3 0

I believe the correct answer would be B

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Cho 2.3 gam natri vào 100ml nước . Tính nồng độ dung dịch thu được ( C% )

Anton [14]

Answer:

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2 years ago

Convert 2.39 x 1022 molecules of water into moles of water

torisob [31]

Answer:

$0.0397\ \text{mol}$

Explanation:

Number of molecules of water = $2.39\times 10^{22}$

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Number of moles is given by

$\dfrac{2.39\times 10^{22}}{6.022\times 10^{23}}$

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The number of moles of water is $0.0397\ \text{mol}$ .

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3 years ago

When calcium hydroxide is formed, heat is released. Calculate the amount of heat (in kJ) released when 2 moles of calcium hydrox

babunello [35]

Answer:

Explanation:

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2 years ago

A student sees an absorbance a=1.140 for his solution that has a concentration of c=1.50*10-4 m using 0.50 cm cuvette. what is t

777dan777 [17]

The molar extinction coefficient is 15,200 $M^{-1} cm^{-1}$ .

The formula to be used to calculate molar extinction coefficient is -

A = ξcl, where A represents absorption, ξ refers molar extinction coefficient, c refers to concentration and l represents length.

The given values are in required units, hence, there is no need to convert them. Directly keeping the values in formula to find the value of molar extinction coefficient.

Rewriting the formula as per molar extinction coefficient -

ξ = $\frac{A}{cl}$

ξ = $\frac{1.140}{1.5*10^{-4}*0.5 }$

Performing multiplication in denominator to find the value of molar extinction coefficient

ξ = $\frac{1.140}{0.000075}$

Performing division to find the value of molar extinction coefficient

ξ = 15,200 $M^{-1} cm^{-1}$

Hence, the molar extinction coefficient is 15,200 $M^{-1} cm^{-1}$ .

Learn more about molar extinction coefficient -

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1 year ago

Xa4D6A/viewform?hr_submission=ChglisyXkhUSEAj9|d2MkQsSBwjg24qS6woo

Juli2301 [7.4K]

It’s should be option 4

4 0

3 years ago

Read 2 more answers