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3 years ago

After an experiment, scientists write a ___ which summarizes their experiment and results

Chemistry

1 answer:

Rudiy273 years ago

6 0

After an experiment, scientists write a Conclusion which summarizes their experiment and results.

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Give some examples of plants in which stem stores food.

Pavel [41]

Answer: suger cane

The suger cane is a plant which store it's food in it's stem and it is where suger cane is made from.

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3 years ago

Alguien me ayuda por favor

Shalnov [3]

B I think it’s right I hope it is

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3 years ago

Two gases helium and x are released from one end of an evacuated long cylinder at the same time if it takes helium atoms 3 times

Gemiola [76]

Answer:

Hypoflorous acid, HOF

Explanation:

From the question, we're told that the helium atoms effuses 3 times than the said gas X.

We can determine the rate of effusion by using the formula

r is inversely proportional to 1/√M, where M is the molecular mass of the gas.

And also,

r is inversely proportional to 1/t, where t is the time taken for effusion.

From both formulas I listed, we can conclude that t is directly proportional to √M. And thus we proceed.

The molecular mass of Helium is 4.

tHe = tX/3, where tx is the time taken for the unknown gas X

As of yet, we don't know the molecular mass of X. Next, we say that

tX/tHe =√Mx/MHe

3 = √Mx/4

If we square both the sides, to remove the square root, we have

9 = Mx/4

Mx = 36

The molecular mass of the unknown gas X is 36.

4 0

3 years ago

2 Students were asked to identify the location of elements in the periodic table based on clues

rjkz [21]

Answer:

Explanation:

I took the test

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3 years ago

What is the new mass/volume percent (m/v) of a KOH solution that is prepared by diluting 110 mL of a 6.0% (m/v) KOH solution to

denis-greek [22]

Answer:

The new mass/volume percent is 2.0% (m/v)

Explanation:

Dilution is a procedure by which the concentration of a solution is decreased, generally with the addition of a diluent. In other words, dilution is a process in which a concentrated solution is always started, to which a greater volume of solvent is added, causing the concentration and volume of the resulting solution to change. But the amount of solute used to prepare the initial solution remains the same.

The calculation of a dilution is made by:

Cinitial. Vinitial = Cfinal. Vfinal

where C indicates concentration and V indicates volume.

In this case:

Cinitial: 6.0% (m/v)
Vinitial: 110 mL
Cfinal: ?
Vfinal: 330 mL

Replacing:

6.0% (m/v) * 110 mL= Cfinal* 330 mL

Solving:

$Cfinal=\frac{ 6.0 (m/v)*110 mL}{330 mL}$

Cfinal= 2.0% (m/v)

<u><em>The new mass/volume percent is 2.0% (m/v)</em></u>

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3 years ago