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satela [25.4K]
4 years ago
13

a student takes three beakers and places 250 ml of water in each. the student then adds a cube of sugar to all three beakers. th

e first beaker is stirred, the second beaker is heated, and the third is left alone. which of the following statements is true? the first beaker dissolves faster than the other two. the second beaker dissolves faster than the other two. the third beaker does not dissolve as fast as one and two. there is not enough information to determine the answer.
Chemistry
2 answers:
Olegator [25]4 years ago
6 0
The third beaker doesnt dissolve as fast as one and two

as it has nothing changed to it

when you stir it gives the sugar more kinetic energy to dissolve
when you heat up the solution it also gives the sugar more kinetic energy

hope that helps 
rjkz [21]4 years ago
6 0

Answer : The correct statement is, the third beaker does not dissolve as fast as one and two.

Explanation :

According to the question, we know that the dissolving process is faster in case of heating as compared to the stirring. And the dissolving process also depends on the how much amount of heat are provided to the substance or the how much faster will you stirring mixture.

The second beaker dissolves faster than the other two, this statement is true but we do not know the how much heat are given to the beaker.

From the given statements we conclude that the correct statement is, the third beaker does not dissolve as fast as first and second beakers because in the third beaker there is no heat or mechanical energy are provided for mixing of the substance.

Hence, the correct statement is, the third beaker does not dissolve as fast as one and two.

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The answer is B. s, p, d, f
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3 years ago
The maximum amount of nickel(II) cyanide that will dissolve in a 0.220 M nickel(II) nitrate solution is...?
sweet [91]

Answer : The maximum amount of nickel(II) cyanide is 5.84\times 10^{-12}M

Explanation :

The solubility equilibrium reaction will be:

                       Ni(CN)_2\rightleftharpoons Ni^{2+}+2CN^-

Initial conc.                        0.220       0

At eqm.                             (0.220+s)   2s

The expression for solubility constant for this reaction will be,

K_{sp}=[Ni^{2+}][CN^-]^2

Now put all the given values in this expression, we get:

3.0\times 10^{-23}=(0.220+s)\times (2s)^2

s=5.84\times 10^{-12}M

Therefore, the maximum amount of nickel(II) cyanide is 5.84\times 10^{-12}M

7 0
3 years ago
PLEASE HELP! Find out whether the chemical equation is balanced or unbalanced.
nordsb [41]

One chemical reaction is called the Haber process, a method for preparing ammonia by reacting nitrogen gas with hydrogen gas:


This equation shows you what happens in the reaction, but it doesn’t show you how much of each element you need to produce the ammonia. To find out how much of each element you need, you have to balance the equation — make sure that the number of atoms on the left side of the equation equals the number of atoms on the right.


You know the reactants and the product for this reaction, and you can’t change them. You can’t change the compounds, and you can’t change the subscripts, because that would change the compounds.


So the only thing you can do to balance the equation is add coefficients, whole numbers in front of the compounds or elements in the equation. Coefficients tell you how many atoms or molecules you have.


For example, if you write the following, it means you have two water molecules:


Each water molecule is composed of two hydrogen atoms and one oxygen atom. So with two water molecules (represented above), you have a total of 4 hydrogen atoms and 2 oxygen atoms.


You can balance equations by using a method called balancing by inspection. You take each atom in turn and balance it by adding appropriate coefficients to one side or the other.


With that in mind, take another look at the equation for preparing ammonia: HOPE THIS HELPS



4 0
3 years ago
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prohojiy [21]

Answer:

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The ketone in this case is 1-phenylpropan-1-one. The provided phosphonium ylide is shown in the image attached. The reaction involves;

i) alkylation  

ii) addition

The product of the major organic product of the reaction is 2-methylene propylbenzene.

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Answer:

B. Water will freeze

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