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Korvikt [17]
3 years ago
11

Column A

Chemistry
1 answer:
baherus [9]3 years ago
3 0

Answer:

The Following are the matching to this question:

1 \to c\\2 \to  b\\3 \to   a\\4   \to  e \\5 \to  d    \\6 \to  f

Explanation:

  1. It includes creating assumptions, extracting predictions through logical outcomes, and experimentation observation based on those projections.  
  2. Every information gathered only with sense is also an observation. It expresses concern relating to scientific research. It also helps research scientists gather data.  
  3. Its independent variable inside an analysis is a controlled variable. It's also called "manipulated," because it can change its parameter, which is controlled one.  
  4. The suggested explanation for an occurrence is a hypothesis. It belongs to the scientific method. That's an experimental forecast, which is checked.  
  5. The experiment manipulates the important variables, calculates the dependent variable, controls any alien variables.
  6. It "reacts" to improvements inside an experiment that they make. It is the result or consequence of an experiment.
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800 calories are released


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See the image below-⬇⬇-

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Needs to be answered ASAP <br><br> What group of protists does Euglena belong to? Why?
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8 0
3 years ago
Determine what mass of sodium nitrite, NaNO2, would be required to prepare a buffer, Buffer A, with a pH of 3.13 from 50.0 mL of
loris [4]

Answer:

1.85 g

Explanation:

The strategy here is to utilize the Henderson-Hasselbach equation

pH = pKa + log [A⁻] / [HA]

to calculate the ratio log [A⁻] / [HA], and from there to calculate the concentration  [A⁻]  and finally the mass of NaNO₂ from the number of moles assuming the final buffer volume is 50.0 mL ( that is the volume does not change by the addition of NaNO₂)

pH = pKa + log [NO₂⁻]/[HNO₂]

3.13 = 3.40 + log [NO₂⁻]/[HNO₂]

- 0.27 =  log [NO₂⁻]/[HNO₂]

taking the inverse log function to both sides of this equation

0.54 =  [NO₂⁻]/[HNO₂]

Now [HNO₂] = 1.0 M, therefore [NO₂⁻] = [NaNO₂] =

0.54 x 1.0 M = 0.54 M

from M = mol / L we get

mol = 0.54 mol/L x 0.050L = 0.027 mol

the molar mass of NaNO₂ is = 68.99 g / mol, so the mass of 0.027 mol is

0.027 mol x 68.99 g/mol = 1.85 g

7 0
3 years ago
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