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Ratling [72]
2 years ago
9

4. Explain error and how it can impact your results from an experiment

Chemistry
1 answer:
Jet001 [13]2 years ago
3 0

Random errors will shift each measurement from its true value by a random amount and in a random direction. These will affect reliability (since they're random) but may not affect the overall accuracy of a result.

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The normal freezing point of water (H2O) is 0.00 oC and its Kf value is 1.86 oC/m. A nonvolatile, nonelectrolyte that dissolves
adelina 88 [10]

Answer:

3.74g of ethylene glycol must be added to decrease the freezing point by 0.400°C

Explanation:

One colligative property is the freezing point depression due the addition of a solute. The equation is:

ΔT=Kf*m*i

<em>Where ΔT is change in temperature = 0.400°C</em>

<em>Kf is freezing point constant of the solvent = 1.86°C/m</em>

<em>m is molality of the solution (Moles of solute / kg of solvent)</em>

<em>And i is Van't Hoff constant (1 for a nonelectrolyte)</em>

Replacing:

0.400°C =1.86°C/m*m*1

0.400°C / 1.86°C/m*1 = 0.215m

As mass of solvent is 280.0g = 0.2800kg, the moles of the solute are:

0.2800kg * (0.215moles / 1kg) = 0.0602 moles of solute must be added.

The mass of ethylene glycol must be added is:

0.0602 moles * (62.10g / mol) =

3.74g of ethylene glycol must be added to decrease the freezing point by 0.400°C

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6 0
3 years ago
What type of bond results from the electrostatic attraction between positive and negative atoms?
Juliette [100K]
It is called a ionic bond
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Methane and water have different chemical properties because
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Answer:

a

Explanation:

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3 0
3 years ago
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Please help me with this chem question it’s due by midnight. I know the answer choice isn’t C.
Vaselesa [24]

Answer:

I believe the answer is A

Explanation:

I hope this helps :)

5 0
3 years ago
Explain why the mass number of oxygen is 16
elena55 [62]

Answer:

Oxygen has an atomic number of 8 , and the mass number of an atom is the sum of its atomic number plus its neutron number. We got the mass as 16 units, and so it'll have 16−8=8 neutrons.

Explanation:

7 0
3 years ago
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