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Aneli [31]
3 years ago
11

I am doing a average atomic mass question. I have the answer to it, but it says to round it to 3 decimal places. The answer is 3

9.89982753. I don't know whether to round it to just the 39.899 or to actually round it to it being 39.900. if anyone could help that would be great!!!!
Chemistry
2 answers:
vichka [17]3 years ago
8 0
You have to round to 39.900. Leaving it as 39.899 would be an inaccurate representation of the molecule’s approximate value, especially for average atomic mass.
White raven [17]3 years ago
8 0

Answer:

Round to 39.900.

Explanation:

You want to round to three decimal places.

39.899 <u>827 53</u>

That means you must drop all the underlined digits.

The rule for rounding is: <em>If the first figure dropped (8) is</em> <em>greater than 5, increase the last figure kept (9) by 1</em>.

Then, rounding 39.899 <u>827 53</u> to three decimal places gives 39.900.

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The strongly polar, hydrogen-bonding properties of water make it an excellent solvent for ionic (charged) species. By contrast,
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Answer:

hello your question is incomplete attached below is the complete question

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Explanation:

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7 0
4 years ago
PLEASE HELP. !!
scoray [572]

Answer:

Potential energy = 441 N

Explanation:

Given:

Mass M = 15 kg

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8 0
3 years ago
In an experiment, hydrochloric acid reacted with different volumes of sodium thiosulfate in water. A yellow precipitate was form
juin [17]

Answer:

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Explanation:

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There are certain factors that affects the rate of reaction, prominent among them is the concentration of reactants. Concentration simply means the amount of substance in a system.

Taking a look at the table given in the question, we will realize that the volume of HCl remained constant, the volume of thiosulphate increased steadily while the volume of water decreased steadily. Remember that concentration increases when less water is added to the system. This implies that the reactant concentration increases steadily. Hence, according to the collision theory, particles collide more frequently and the rate of reaction increases.

As the rate of reaction increases, it now takes a lesser time for the reaction to get to completion (indicated by the disappearance of the cross). Hence as we move down the table, it takes lesser and lesser time for the cross to disappear. This means that the column for time will decrease steadily.

3 0
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7 0
3 years ago
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Answer:

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