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Lorico [155]
3 years ago
15

Please help me answer this question! I don’t understand it at all!

Chemistry
1 answer:
pentagon [3]3 years ago
7 0
The uncertainty principle is one of the most famous (and probably misunderstood) ideas in physics. It tells us that there is a fuzziness in nature, a fundamental limit to what we can know about the behaviour of quantum particles and, therefore, the smallest scales of nature. Of these scales, the most we can hope for is to calculate probabilities for where things are and how they will behave. Unlike Isaac Newton's clockwork universe, where everything follows clear-cut laws on how to move and prediction is easy if you know the starting conditions, the uncertainty principle enshrines a level of fuzziness into quantum theory.
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Acetic acid is a weak acid with a pKa of 4.76. What is the concentration of acetic acid in a buffer solution of 0.2M at pH 4.9.
masya89 [10]

Answer:

0.084 M

Explanation:

Using the Henderson-Hasselbalch equation for a buffer ( a buffer is solution contain a weak acid and it conjugate base; the solution resist change in pH)

pH = pKa + log ( base/acid)

4.9 - 4.76 =log ( base / acid)

10^0.14 =  ( base / acid)

1.38 = (base / acid)

since there is 0.2 M in the buffer solution

the concentration of acid =  \frac{1}{(1+1.38)} × 0.2 = 0.084 M

6 0
3 years ago
When a 2.5 mol of sugar (C12H22O11) are added to a certain amount of water the boiling point is raised by 1 Celsius degree. If 2
Mademuasel [1]

Answer is: boiling point will be changed by 4°C.

Chemical dissociation of aluminium nitrate in water: Al(NO₃)₃ → Al³⁺(aq) + 3NO⁻(aq).

Change in boiling point: ΔT =i · Kb · b.

Kb - molal boiling point elevation constant of water is 0.512°C/m, this the same for both solution.

b -  molality, moles of solute per kilogram of solvent., this is also same for both solution, because ther is same amount of substance.

i - Van't Hoff factor.

Van't Hoff factor for sugar solution is 1, because sugar do not dissociate on ions.

Van't Hoff factor for aluminium nitrate solution is approximately 4, because it dissociates on four ions (one aluminium cation and three nitrate anions). So ΔT is four times bigger.

6 0
3 years ago
Read 2 more answers
What do you think will happen to the kidneys if any of these parts were damaged?
Lemur [1.5K]

Answer:

<h3><u>Whe</u><u>n</u><u> </u><u>your</u><u> </u><u>kidneys</u><u> </u><u>are</u><u> </u><u>damage</u><u> </u><u>waste</u><u> </u><u>products</u><u> </u><u>and</u><u> </u><u>fluid</u><u> </u><u>can</u><u> </u><u>build</u><u> </u><u>up</u><u> </u><u>in</u><u> </u><u>your</u><u> </u><u>body</u><u>.</u><u> </u><u>That</u><u> </u><u>can</u><u> </u><u>cause</u><u> </u><u>swelling </u><u> </u><u>in</u><u> </u><u>your</u><u> </u><u>ankles</u><u> </u><u>nausea</u><u> </u><u>weakness </u><u>poor</u><u> </u><u>sleep</u><u> </u><u>and</u><u> </u><u>shortness</u><u> </u><u>of</u><u> </u><u>breath</u><u>.</u><u> </u><u>so</u><u> </u><u>without</u><u> </u><u>treatement </u><u> </u><u>the</u><u> </u><u>damage</u><u> </u><u>can</u><u> </u><u>get</u><u> </u><u>worse</u><u> </u><u>and</u><u> </u><u>your</u><u> </u><u>kidney</u><u> </u><u>may</u><u> </u><u>eventually </u><u>stop</u><u> </u><u>working</u><u>.</u></h3>
3 0
3 years ago
Select the correct answer.
frozen [14]

Answer:

1.79x10^-14

Explanation:

pOH + pH = 14

H+=10^-pH

- Hope that helps! Please let me know if you need further explanation.

3 0
3 years ago
When a substance is entering a phase change, the gain or loss of heat is a result of?
sweet [91]

When a substance is entering a phase change, the gain or loss of heat is a result of energy gained or lost in forming or breaking intermolecular interaction.

The constant temperatures occur when a substance is undergoing a phase transition.  If heat is removed from a substance , such as in freezing and condensation , then the process is exothermic . In this instance , heat is decreasing the speed of the molecules causing then move slower.

In chemistry and thermodynamics, phase transitions (or phase changes) are the physical processes of transition between a state of a medium, identified by some parameters, and another one, with different values of the parameters.

Commonly the term is used to refer to changes among the basic states of matter: solid, liquid, and gas, as well as plasma in rare cases.

For example, a phase of a thermodynamic system and the states of matter have uniform physical properties. During a phase transition of a given medium, certain properties of the medium change, often discontinuously, as a result of the change of external conditions, such as temperature, pressure, or others.

For example, a liquid may become gas upon heating to the boiling point, resulting in an abrupt change in volume. The measurement of the external conditions at which the transformation occurs is termed the phase transition. Phase transitions commonly occur in nature and are used today in many technologies.

Learn more about  phase change here :

brainly.com/question/12390797

#SPJ4

8 0
2 years ago
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