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Katarina [22]
3 years ago
14

What is the oxidation number of boron in Na2B4O7

Chemistry
1 answer:
makkiz [27]3 years ago
7 0
The answer is 4. Hope it helps!
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A student mixes chemicals A and B together and records the amount of time it takes for a color change to occur. The student repe
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Answer:

It is mentioned that the student is mixing chemicals A and B and observes the time taken for the color to change. However, in the experiment, it is noticed that the student has repeated the procedure five times and each time he or she is modifying the concentration of chemical B. Thus, it is clear that the concentration of chemical B is the independent variable in the experiment. An independent variable is illustrated as the variable, which is controlled or modified in the experiment.

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If the element is closer to the top of the table is it's ionization energy larger?
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21

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2 years ago
Whats between -999 and 1000
Doss [256]
Hello!

Numbers from -998 and 999 are in between -999 and 1000.

I hope this was helpful! c:
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Express 0.044 km in meters.
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7 Which physical characteristic of a solution may
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Transition elements are present in the middle of periodic table. These are d-block elements.

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