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natta225 [31]
3 years ago
11

if you pour out some of the water in a bucket,does the density of the remaining water change? explain.

Chemistry
2 answers:
Aleksandr [31]3 years ago
5 0
The density does not change because it is still the same liquid as before
Fynjy0 [20]3 years ago
3 0
Yes, because if you assume that you have a full bucket of water and when you try to pick it up, it too heavy to pick up without a struggle so when you pour half the water out of the bucket, the bucket of water is a lot easier to pick up, thus the density of the bucket of water changes.
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A certain liquid X has a normal boiling point of 118.4 °C and a boiling point elevation constant K=2.40 °С kg-mol-1. A solution
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Answer:

43.47 g

Explanation:

The <em>boiling point elevation</em> is described as:

  • ΔT = K * m

Where ΔT is the difference in boiling points: 120.6-118.4 = 2.2 °C

K is the boiling point elevation constant, K= 2.40 °C·kg·mol⁻¹

and m is the molality of the solution (molality = mol solute/kg solvent).

So first we <u>calculate the molality of the solution</u>:

  • ΔT = K * m
  • 2.2 °C = 2.40 °C·kg·mol⁻¹ * m
  • m=0.917 m

Now we calculate the moles of benzamide (C₇H₇NO, MW=315g/mol), using the given mass of the liquid X.

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net ionic equation

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Explanation:

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To get the net ionic equation we remove the spectator ions and we get:

SO₄²⁻ (aq) + Ba²⁺ (aq) → BaSO₄ (s)

were:

(aq) - aqueous

(s) - solid

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