I'm assuming A, but it says modern, so..
884 pounds of carbon dioxide are emitted in 400 litres.
What is a pound?
The pound is defined as the basic unit for weight in the Foot Pound Second (F.P.S) system and is equal to 16 ounces.
To convert a litre measurement to a pound measurement, multiply the volume by 2.204623 times the density of the ingredient or material. Thus, the volume in pounds is equal to the litres multiplied by 2.204623 times the density of the ingredient or material.
One litre of water weighs approximately 2.21 pounds.
So 400 liter = 400 liter x 2.21 pounds
= 884 pounds
Hence, 884 pounds of carbon dioxide are emitted in 400 litres.
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Answer;
H- (negatively charged hydrogen ion)
Explanation;
The hydrogen ion has the same electron configuration as an atom of Helium. -Hydrogen ion is formed when a hydrogen atom loses or gains an electron. A positively charged ion is formed when hydrogen atom loses an electron (remaining with zero electrons) while a negatively charged ion (H-) is formed when a hydrogen atom gains an electron thus having 2 electrons.
-Helium atom has two electrons, therefore, it is similar with an negatively charged hydrogen.
- Pressure=p=1atm
- Temperature=T=273K.
- V=1dm^3=1L
we need no of moles
No of molecules=No of moles×Avagadro no
