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irina1246 [14]
3 years ago
15

which of the following experiments follow ethical standards? A.)performing test on animals when the information can be obtained

in other ways. B.) experiments done to people who cannot protect themselves. C.) Releasing contaminated contaminated waste into the water system. D.) Research on animals in which the animal in which the animal experiences no fear or pain.
Chemistry
2 answers:
Ilya [14]3 years ago
5 0

Answer:

D.) Research on animals in which the animal experiences no fear or pain.

Explanation:

It is ethical to perform test on an animal such that the animal experiences no fear or pain.  

It is unethical to perform test on an animal when some other tests can be performed without the animal to get the desired results.  

Polluting the water resource with contamination is an unethical practice.  

People who are vulnerable cannot be subjected to experiments.  

olasank [31]3 years ago
3 0
The answer is D because it sounds like the most ethical answer. The other choices are wrong because the could possibly hurt someone or an animal.
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Digiron [165]

The molar concentration of the KI_3 solution is 0.251 mol/L.

<em>Step 1</em>. Write the <em>balanced chemical equation</em>

I_3^(-) + 2S_2O_3^(2-) → 3I^(-) + S_4O_6^(2-)

<em>Step 2</em>. Calculate the <em>moles of S_2O_3^(2-)</em>

Moles of S_2O_3^(2-)

= 27.9 mL S_2O_3^(2-) ×[0.270 mmol S_2O_3^(2-)/(1 mL S_2O_3^(2-)]

= 7.533 mmol S_2O_3^(2-)

<em>Step 3</em>. Calculate the <em>moles of I_3^(-) </em>

Moles of I_3^(-) = 7.533 mmol S_2O_3^(2-)))) × [1 mmol I_3^(-)/(2 mmol S_2O_3^(2-)] = 3.766 mmol I_3^(-)

<em>Step 4</em>. Calculate the <em>molar concentration of the I_3^(-) </em>

<em>c</em> = "moles"/"litres" = 3.766 mmol/15.0 mL = 0.251 mol/L

6 0
3 years ago
A container of gas has a pressure of 3.4 atm at 30 ° C. If the gas is compressed to 1.5 atm, what is the new temperature?
Svetlanka [38]

Answer:

13.2 centigred due to that pressure

3 0
3 years ago
A pale of sand and water
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Explanation:

6 0
3 years ago
2.At 35°C, a small sample of methane gas (CH4) has a volume of 1.5 liters. The temperature of the methane gas is slowly cooled t
defon

Answer:

V₂ = 1.41 L

Explanation:

Given data:

Initial temperature = 35°C (35 +273.15 K = 308.15 K)

Initial volume = 1.5 L

Final temperature = 17°C (17+273.15 K = 290.15 K)

Final volume = ?

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

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T₂ = Final temperature

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V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

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5 0
3 years ago
What is the nature of the P-O bond in phosphorus pentoxide (P2O5)?
Bad White [126]
Correct Answer: option B. moderately polar covalent 

Reason: 
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3 0
3 years ago
Read 2 more answers
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