I think the answer is D. the upper surface of undergound water.
Answer:
helium
Explanation:
it has 8 valence electrons which fills its outer energy level making it have a stable arrangement of electrons hence least reactive
Answer:
55,000,000
Explanation:
550 hectometers [hm] = 55,000,000 millimeters [mm]
If the sugar makes up 25% of the solution, that means the water makes up 75%, or 3/4, of the solution.
Set up a proportion to solve:

Cross multiply:


Therefore, there are 354 grams of water in the solution.
The formula is Mn2+CO2= MnCO3