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Ilya [14]
3 years ago
12

After mixing the solutions in a separatory funnel, the stopper should be ________and the liquid should be ________and the layers

allowed to separate. When you get close to the interface between the layers, ________the funnel and________until the first layer______ is collected. _______to collect the second layer.
Chemistry
1 answer:
sdas [7]3 years ago
4 0

Answer:

The answer is below

Explanation:

The separation technique is used for separating immiscible liquids.

When separating, the stopper has to be removed when draining the lower layer so as to prevent a vacuum. If vacuum is allowed, the draining rate will reduce and stop.

The liquid should be mixed by shaking the funnel and then opening the stopcock so as the vent out gases.

When near interface between the layers, you should set your eye level so that you do not drain up to the second layer.

After completely draining the first layer, the second layer should be collected in a new flask.

After mixing the solutions in a separatory funnel, the stopper should be removed and the liquid should be mixed thoroughly and the layers allowed to separate. When you get close to the interface between the layers, get eye level with the funnel and slow the draining until the first layer is collected. Switch to a new flask to collect the second layer.

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If this energy were used to vaporize water at 100.0 ∘C, how much water (in liters) could be vaporized? (Assume the density of wa
11Alexandr11 [23.1K]

Answer:

0.425 L  

Explanation:

Given the information from the question.  We know that the water heat evaporation is given by 2261 KJ/kg. Therefore, for each Kg of vapor, 2261 is required.

To calculate the amount of water evaporated by 960 KJ is as follows  

= (1/2260)*960 =0.425 Kg

In other words, 0.425 of water is evaporated by 960 KJ.  

To calculate the volume of water, we have mass and density. Therefore, Volume = Mass/Density = 425g/1g/ml = 0.425 L.

Therefore, water evaporated is 0.425 L  

5 0
4 years ago
Coal, which is primarily carbon, can be converted to natural gas, primarily ch4, by the exothermic reaction:
Leno4ka [110]
Unfortunately, your question is incomplete So, according to the attached picture of the complete question we will explain the answer:
according to the reaction equation:
C(s) + 2H2(g) ↔ CH4(g) ΔH° = -74.6KJ 
So the true answer will be D i and ii

- as by adding more C and it is a reactant so the reaction will go rightward to the product to decrease the C to achieve the equilibrium again, the movement of the reaction towards the products will make the CH4 increase

- and by decreasing the Heat and the heat here is as a product as the reaction is exothermic so by decreasing the heat the reaction will go toward the products to increase the heat and achieve the equilibrium again, and that also makes the CH4 increase as it is a product.
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5 0
4 years ago
Type the correct answer in each box.
Luba_88 [7]

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Weight of the object on moon = 72N

6 0
3 years ago
Are the “strings” of celery xylem or pholem tissue?
Marysya12 [62]
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6 0
3 years ago
A+100+gram+alloy+of+nickel+and+copper+consists+of+70+wt+%+ni+and+30+wt+%+cu.+what+are+the+atom+percentages+of+ni+and+cu+in+this+
Softa [21]

Atomic percentages<u>: 68% of copper and 32% of nickel.</u>

How this is calculated?

The given alloy is 100 g ,

m(Cu) = 0,7 · 100 g = 70 g.

m(Ni) = 0,3 · 100 g = 30 g.

n(Cu) = m(Cu) ÷ M(Cu) = 70 g ÷ 63,546 g/mol

n(Cu) = 1,10 mol.

n(Ni) = m(Ni) ÷ M(Ni) = 30 g ÷ 58,71 g/mol

n(Ni) = 0,51 mol

n(Cu) : n(Ni) = 1,10 mol : 0,51 mol

%(Cu) = 1,1 mol ÷ 1,61 mol = 0,68 = 68 %.

Similarly, %(Ni)=32%

What are Cu-Ni alloys?

  • Cu-Ni alloys are alloys of copper (base metal with the largest individual content) and nickel with or without other elements, whereby the zinc content may not be more than 1%.
  • When other elements are present, nickel has the largest individual content after copper, compared with each other element.
  • As with other copper alloys, it is necessary to distinguish between wrought alloys, which are processed to semi-finished products, and cast alloys, from which castings are produced by various casting processes.

To know more about  Cu-Ni alloys, refer:

brainly.com/question/16856761

#SPJ4

6 0
2 years ago
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