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Tpy6a [65]
3 years ago
7

The element X has 2 valence electrons. its is a

Chemistry
1 answer:
Lesechka [4]3 years ago
6 0

helium, beryllium, magnesium, calcium, strontium, barium, radium. i believe any of these are proper answers.


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Round to 4 significant figures.<br> 0.007062
lapo4ka [179]

Answer:

Hey there!

This is already rounded to four significant figures!

Zeroes after the decimal but before the 7 don't count, and 7, 0, 6, and 2 count as significant figures.

So, the answer would be 0.007062.

Let me know if this helps :)

8 0
3 years ago
Three chemistry students measured the length of a copper bar. The recorded lengths were 5.05 cm, 5 cm , and 5.1 cm, What is the
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5.05 + 5 + 5.1 = 15.15cm Then you just divide it by the amount of measurements you had like this:15.15 ÷ 3 = 5.04999971cm Then you can just round it to the 3rd figure: 5.05cm < And that's the mean/average length of the bar. :) (Or the one above if you want all of the decimals too) 
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3 years ago
An independent variable is what you___in an experiment. (There are no selections so please just answer it)
yaroslaw [1]

Answer:

Don’t change, keep the same

Explanation:

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2 years ago
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PilotLPTM [1.2K]
Mitosis makes new cells and replaces the cells that are old, lost or damaged
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3 years ago
Which step will decrease the pressure of a gas inside a closed cubical container
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In order to <span>decrease the pressure of a gas inside a closed cubical container, you need to decrease the temperature of the container. The volume of the system is rigid so it means volume is constant. By the ideal gas law, temperature and pressure are directly related. Increasing the temperature, increases the pressure and the opposite to happens.</span>
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3 years ago
Read 2 more answers
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