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galina1969 [7]
2 years ago
10

why is it better to use several trials of a titration rather than one trial to determine the concentration of a solution of unkn

own concentration?
Chemistry
1 answer:
svlad2 [7]2 years ago
6 0
Because you are never 100% precise during the work, so it's best and most accurate answer is always the average of more trials. basically the more you do, the more accurate the answer shall be 
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What is surface tension? describe how surface tension in water is useful for plant and animals.
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Answer:

It helps creatures to walk on the water.

Explanation:

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Aqueous potassium iodate and potassium iodide react in the presence of dilute hydrochloric acid, as shown below. kio3(aq) + 5ki(
Musya8 [376]
<span>0.0797 g Looking at the formula, 1 mole of KIO3 and 5 moles of KI will react and produce moles of iodine molecules or 6 moles of iodine atoms. So first, determine the number of moles of KIO3 and KI provided moles KIO3 = 0.0121 * 0.097 = 0.0011737 mol moles KI = 0.0308 * 0.017 = 0.0005236 mol The limiting reactant is KI at 0.0005236 mol so divide by 5 and multiply by 6 to get the number of moles of iodine atoms. 0.0005236 / 5 * 6 = 0.00062832 mol Lookup the atomic weight of iodine which is 126.90447 And multiply that by the number of moles of iodine produced 126.90447 g/mol * 0.00062832 mol = 0.079736617 g Rounding to 4 decimal places gives 0.0797 g</span>
4 0
3 years ago
explain in terms of electronegativity difference Y the bond between hydrogen and oxygen in a water molecule is more polar than t
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Answer: More the electronegativity difference, more polar will be the bond.

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Polarity of the bond is described by the electronegativity difference between the elements making the bond. More the electronegativity difference, more polar is the bond.

The electronegativities of oxygen, hydrogen and nitrogen are:

For Oxygen : 3.44

For Hydrogen : 2.1

For Nitrogen : 3.04

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Electronegativity difference between oxygen and hydrogen = (3.44 - 2.1) = 1.34

In NH_3

Electronegativity difference between nitrogen and hydrogen = (3.04 - 2.1) = 0.94

As, the Electronegativity difference between oxygen and hydrogen is more, therefore water molecule is more polar.

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2 years ago
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(H2O) and (O2) ??

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I hope it helps...

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snovd vosb r

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