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Degger [83]
3 years ago
5

The solvent in a solution evaporates out over time, leaving behind the solute.

Chemistry
1 answer:
Andrews [41]3 years ago
3 0

Answer:

When a solution is heated, the solvent evaporates, leaving behind the dissolved solids as residue. When a solution containing dissolved solutes is heated, the solvent will evaporate.

Explanation:

. P.S. Evaporation to dryness cannot be use for solutions like sugar solution because the sugar will decompose upon heating.

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Water has a high specific heat because: Select one: a. it is a poor insulator b. hydrogen bonds must be broken to raise its temp
Crank
<h2>The required "option is b) hydrogen bonds must be broken to raise its temperature.</h2>

Explanation:

  • Water has high specific heat due to hydrogen bonds present in it.
  • The Ionisation of water does not affect the specific heat of the water.
  • On decreasing the temperature, there is the formation of bonds hence option (d) is wrong.
  • On increasing the temperature, there is the breaking of bonds hence option (b) is correct.
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3 years ago
If Tommy had started with 0.75 moles of potassium carbonate how many moles of
worty [1.4K]

Answer:

points

Explanation: suggest watching a video

4 0
3 years ago
A sample of 0.370 mol of a metal oxide (m2o3) weighs 55.45 g. how many grams of o are in the sample?
Wewaii [24]
0.370 mol metal oxide = 55.45 g 

<span>1 mol = 55.45/0.370 = 149.86 g </span>

<span>in 1 mol there are 3 mol O = 16 * 3 = 48 g of O </span>

<span>there is 48/149.86 * 100% O in the sample </span>

<span>the sample has 48/149.86 * 0.370 = 0.119 g O</span>
6 0
3 years ago
Set the Room temp. to -10.0 °C and observe. What is happening?
Lady bird [3.3K]

Answer:

its getting colder

Explanation:

6 0
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Imagine that you are playing a game of Clue in which Mrs. White is killed in the conservatory. You have a device in each room to
myrzilka [38]

Answer:

  • <u><em>Mr. Plum</em></u><em> killed Mrs. White.</em>

Explanation:

<u>1) Wavelengths for the different light colors (visible light) and related character:</u>

Color  Wavelength          related character

Violet  380–450 nm  ← Professr Plum

Blue  450–485 nm  ← Mrs. Peacock

Cyan  485–500 nm  

Green  500–565 nm  ← Mr. Green

Yellow  565–590 nm  ← Colonel Mustard

Orange  590–625 nm  

Red  625–740 nm  ← Miss Scarlet

<u>2) At the time of the murder, the spectrometers recorded:</u>

a) In the <em>dining room</em>: <em>520 nm</em>.

520 nm is in the range 500 - 565 nm, which is the range for green color, so <em>Mr. Green</em> was in the dining room and is no more a suspect.

b)<em> In the lounge and study: lower frequencie</em>s.

Since frequency and wavelength are inversely related, the wavelengths in the longe and study have to be of <em>yellow and red</em> colors, which are the only two with longer wavelengths from the option given.

Then, <em>Mustard and Scarlet</em> are not criminal.

c)<em> In the library: the second shortest wavelength of the five recorded. </em>

<em />

The second shortest wavelength, as per the table, is that of <em>blue </em>color. So, <em>Mrs. Peacock</em> is not the killer.

The only left option is violet, so Mr. Plum is the only who could be at the conservatory and he is the killer.

7 0
3 years ago
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