Answer:
About 7.109g
Explanation:
25000mL is the same as 25 liters.

Multiplying this by the molar mass of nitrogen, you get about 7.109 grams of nitrogen. Hope this helps!
B. Radiation
Thermal energy from the sun fto Venus.
4 is correct for this one
The chemical composition of water is H2O – two hydrogen atoms and one oxygen atom. Water has special properties because of the way these atoms bond together to form a water molecule, and the way the molecules interact with each other. ... Water's polarity allows it to dissolve other polar substances very easily.
The molarity of a solution is defined as the moles of solute over liters of solution. That means that M=5/2=2.5. Therefore the answer is 2.5M. I hope this helps. Let me know if anything is unclear.