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professor190 [17]
3 years ago
8

Question 4

Chemistry
2 answers:
xenn [34]3 years ago
8 0

Answer:

there are 19 neutrons

ludmilkaskok [199]3 years ago
6 0
There are 19 neutrons shown In this answer If you need more help search it up on the web
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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
In the temperature part of the experiment, which antacid tablet dissolved the fastest? Which antacid tablet dissolved the slowes
Degger [83]

Answer:

Correct answer is:  "Cold Water"

Explanation:

EDGE 2020

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2 years ago
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What law determines that chemical equations must be balanced? What does this law say?
NNADVOKAT [17]
This is seen in the first law of Thermodynamics stating that matter and energy cannot be destroyed nor created.
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Which of the following is NOT a characteristic of minerals
o-na [289]

Answer:

A. Occur in gaseous and liquid state

Explanation:

The choice that is not a characteristic of minerals is that minerals occur in gaseous and liquid state.

All minerals are solid inorganic compounds.

  • A mineral is an inorganic compound that is formed naturally.
  • They have a definite and specific chemical composition.
  • Minerals are the building blocks of rocks.
  • When minerals aggregates together, they form different rock types.
  • There is no known mineral that is in fluid state.
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