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elena-s [515]
4 years ago
7

Henry plans to monitor the change in concentration of an acid during a chemical reaction. He wants to collect data every 0.1 sec

onds and then to graph his data and insert it into a text document.
Which pair of tools would be best for Henry to use?
Chemistry
2 answers:
levacccp [35]4 years ago
7 0

Answer : Henry would require a pH paper to check the acid changes and a graphing calculator would be useful to draw a graph and it can be helpful to insert into text document.

Explanation : Also, Henry can use a concentration probe alternatively, to measure the concentration changes in the chemical reaction. pH paper will give an approximate estimation about the acidity changes in the reaction system. And the graphing calculator will help to graph the data with the collected data points.

gregori [183]4 years ago
6 0
I think he will need a concentration probe and to graph his data and insert it into a text document would most easily be done with a computer.
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Calculate the number of grams contained in each of the following number of moles. Report your answer with the appropriate number
Debora [2.8K]

<u>Answers:</u>

a. 131.85 grams

b. 134.69 grams

To calculate the number of grams in the number of moles given for each compound, consider the formula:

<em>Moles = No. of grams / molar mass</em>

Therefore, to find the gram it will become:

<em>No. of grams = moles x molar mass</em>

a.  0.410 mol of NaCl (sodium chloride)

Molar mass of NaCl = (286.14 + 35.45) = 321.59

No. of grams = moles x molar mass

No. of grams = 0.410 x 321.59 = 131.85 grams

b. 4.80 mol of C2H4 (ethylene)

Molar mass of C2H4 = (12.01 x 2) + (1.01 x 4) = 28.06

No. of grams = moles x molar mass

No. of grams = 4.80 x 28.06 = 134.69 grams

3 0
3 years ago
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Whats the difference between Homogeneous and Hetrogeneuos?
irakobra [83]

Answer:

Homogeneous - With a uniform appearance

Heterogeneous - With visible differences in the mixture

Explanation:

Referring to mixtures, homogeneous looks the same throughout, while heterogeneous has particles or whatnot.  

Basically:

Homo means same

Hetero means different

6 0
4 years ago
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3 years ago
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If 22.5L of nitrogen at 748 mm Hg are compressed to 725 mm Hg at constant temperature. What is the new volume?2.A gas with a vol
kykrilka [37]

Answer:

a)23.2 L

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Explanation:

From Boyle's law:

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P2=725mmHg

V1= 22.5L

V2??

V2= P1V1/P2= 748×22.5/725= 23.2 L

b)

V1=4.0L

P1= 205×10^3Pa

V2= 12.0L

P2=???

P2= P1V1/V2= 205×10^3×4/12

P2= 68.3×10^3 Pa or 68.3kPa

c)

P1= 1 atm

V1= 196.0L

P2= ??

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P2= P1V1/V2=1×196.0/26.0

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V2=???

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V2=60.5L

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I am going to say C. it has to do with the angles
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