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Jet001 [13]
3 years ago
13

explain why aqueous solutions of ionic crystals conduct electricity? which particles in this case carries electricity?

Chemistry
1 answer:
dangina [55]3 years ago
5 0

Answer:

Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ions are free to move from place to place. Ionic compounds cannot conduct electricity when solid, as their ions are held in fixed positions and cannot move.

Explanation:

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A certain element exists as two different isotopes. 76.00% of its atoms have a mass of 35.00 amu and 24.00% of its atoms have a
ivanzaharov [21]

Answer:

35.48 uma

Explanation:

An isotope is when an element has equal numbers of protons but different mass value because it has different amount of neutrons.

To calculate the average atomic mass with the given data:

First change de percentages to fractional numbers, divide by 100.

Remember the sum of a percentage is equal to 100, but when you are adding the fractions the sum is equal to 1.

76/100 = 0.76

24/100 = 0.24

  %       fraction

76.00 0.76

24.00 0.24

total100.00 1.00

Now, multiply the mass with their corresponding fraction:

35(0.76) = 26.60

37(0.24) =  8.88

%      fraction amu amu

76.00 0.76 35         26.60

24.00 0.24 37         8.88

total100.00 1.00    average 35.48

Now you add the calculated mass to obtain the average atomic mass of the element.

And the value you will get is 35.48 amu.

I included an excel table so you can review it, I like to organize all the given data and the calculation in tables, also I think is easier to understand.

Download xlsx
7 0
3 years ago
What is the bronsted acid of NO2- + H2O HNO2 + OH-​
sammy [17]
<h3><u>Answer</u>;</h3>

H2O -Bronsted Acid

<h3><u>Explanation;</u></h3>
  • Bronsted-Lowry acids are  H+ donors , while Bronsted-Lowry bases are H+ acceptors .
  • A reaction of a Bronsted-Lowry acid and a Bronsted base is a neutralization reaction that is characterized by H+ transfer.
  • The above reaction is an example of base ionization or dissociation where;

                 B (aq) + H2O (l) → BH+ (aq) + OH– (aq)

          That is; Base + Acid will give a conjugate acid + hydroxide ion

  • In our case; NO2- + H2O → HNO2 + OH-​ ; H2O is the H+ donor and thus, it is a Bronsted Acid.

8 0
3 years ago
In what element will metallic bonding occur?
Hatshy [7]
D




A- Harvard university professor
6 0
3 years ago
Suppose you are working in a chemistry lab and trying to make a solution of a substance called Sodium Chloride (which is a solid
Alenkasestr [34]

Answer:

a weighing balance, a measuring cylinder, a spatula, a beaker/flask, and a stirrer

Explanation:

The lab apparatus that would be needed to prepare a solution of sodium chloride would be <em>a weighing balance, a measuring cylinder, a spatula, a beaker/flask, and a stirrer.</em>

The weighing balance would be used to weigh out the required amount of sodium chloride. The beaker or flask would be placed on the weighing balance and its weight zeroed. The spatula would then be sued to take out the sodium chloride from its container into the beaker till the required amount is reached. The measuring cylinder would then be used to measure out the required volume of water which would be added to the salt in the beaker. The stirrer would then be used to stir the mixture in order for the salt to dissolve.

7 0
3 years ago
What are homogenous mixtures
svetoff [14.1K]

Answer:

a mixture in which the composition is uniform throughout the mixture.

Explanation:

7 0
3 years ago
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