Hey there,
Answer:
Photosynthetic cell
Hope this helps :D
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The nitrogen has been reduced or has undergone reduction and it has gained one electron
<span>Ionic bonding between sodium and phosphate ions.</span>
Answer:
3rd statment
Explanation:
ray 1 and 2 are same vertical line
Answer:
Density of the He atom = 12.69 g/cm³
Explanation:
From the information given:
Since 1 mole of an atom = 6.022x 10²³ atoms)
1 atom of He = 

The volume can be determined as folows:
since the diameter of the He atom is approximately 0.10 nm
the radius of the He =
= 0.05 nm
Converting it into cm, we have:


Assuming that it is a sphere, the volume of a sphere is
= 
= 
= 
Finally, the density can be calcuated by using the formula :


D = 12.69 g/cm³
Density of the He atom = 12.69 g/cm³