Answer:
Atomic number is 8 and mass number is 17.
Explanation:
From the figure,
The number of protons= 8
The number of neutrons = 9
Any atom contains equal number of protons and electrons.Hence, the atomic number of element is 8.
The atomic number eight element in the periodic table is "Oxygen.
And mass number is 17.
They are called inert gases, Nobel gases.
The common character in them all that they have a complete last electron shell. That they rarely tend to form any further chemical compounds.
Kilograms B because milligrams would be too high of a number and kilometres is a length measurement and so is milliliters
Answer:
The gas with molar mass 83.9 g is Krypton, Kr
Explanation:
We know that as per Ghram's law of diffusion,
r'/ r= square root (M/M')
0r
Where
r= rate of diffusion of Cl2
r'= rate of diffusion of unknown gas= 0.920r
Also, M= molar mass of Cl2= 71 g/ mol
And, M'= molar mass of unknown gas which we have to find
Let us substitute the values in above equation
solving we get M' = 83.9 g/mol
Therefore, the gas with molar mass 83.9 g is Krypton,Kr
Hey there!
Let's remember something. All over us, there is pressure, everywhere we go. So, this means that, if you were to hold something, (especially) high off the ground and there is higher pressure in the sky then on level ground, this would mean that the molecules would be more complex, and they would break down.
So, from your options listed above, I believe that the best answer to would go with this question would be Option B.) <span>They break down complex molecules.
I hope this helps you!
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