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Anestetic [448]
3 years ago
12

Why are elements in the column with helium so stable ?

Chemistry
1 answer:
jeka57 [31]3 years ago
8 0

Answer:

Explanation:

because they have complete valence shell thats why they are not reactive towards chemical reaction and are quite stable

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HELP!!! PLEASE!!!
elena-14-01-66 [18.8K]
<span>Molarity is expressed as the number of moles of solute per volume of the solution. We solve the problem above as follows:

0.1000 mol Mg(NO3)2 / L (.1 L) ( </span><span>148.3 g / mol ) = 1.483 g Mg(NO3)2

</span>0.1000 mol Sr(NO3)2 / L (.1 L) ( 211.63 g / mol ) = 2.116 g Sr(NO3)2

Hope this answers the question. Have a nice day.
8 0
3 years ago
14. If one half-life is the amount of time it takes for a radioactive isotope to decay by a factor of 2,
Rainbow [258]

Answer:

Since the equation for amount remaining is (1/2)^n, where n stand for the number of half lives, after 2.3 half lives the equation is (1/2)^2.3. This makes the answer about   1/4.92, which converts to about 20% of the original amount.

Explanation:

4 0
3 years ago
Read 2 more answers
What should you be careful of when measuring the temperature of a liquid in a beaker
andrezito [222]

The precaution to be taken while measuring the temperature of a liquid in a beaker is applying proper heat balance and taking all the required precautions.

  • A beaker with an open top contains a sample of liquid. It exposes this sample to light.
  • That liquid absorbs the light energy, turning it into heat energy. As a result, the liquid becomes warmer and evaporation is accelerated. As a result, there is less liquid in the beaker.
  • Since it is well known that the surface temperature of a liquid, along with air movement above the liquid surface, is one of the dominant factors affecting evaporation, I want to measure the evaporation rate as a function of surface temperature.
  • This can be done by applying a heat balance.

Learn more about heat balance at:

brainly.com/question/1292905

#SPJ9

3 0
2 years ago
Calculate the molar mass of ammonium chloride
il63 [147K]

Answer:

53.491 g/mol

Explanation:

Create the chemical compound and find each individual element's molar mass. Lastly, add them up.

3 0
3 years ago
Which is not one of the parts of the cell theory.
alekssr [168]

Answer:

Pretty sure the answer is d) cells come from nonliving objects

Explanation:

i just think i remember xd

7 0
3 years ago
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