A polyatomic ion is a group of elements that has a charge that is not 0. for example the charge of P04 is -3
The correct answer is letter C. Rock Cycle. Living organisms involved in carbon cycle, oxygen cycle, and in nitrogen cycle. These are involved in the air that living organisms are taking in and out.
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Molar mass of 


<u>As we know</u>–
1 mol =
formula units
1 mol
= 143.092 g =
formula units
Henceforth –
formula units
–



Helloo
To convert to L
2.5 hm^3 * (100m/hm)^3 *1000 L/m^3 gives a volume of 2.5*10^9 L
Have a nice day