Answer:
Oxygen is the component of air necessary for life on Earth. All living organisms require it for respiration.
Answer:THE CORRECT ANSWER IS "B" only the electrons in the outermost shell!!!!
Explanation:
I. JUST. TOOK. THE. TEST!!!!!!
C is the correct answer :)
Mass of water: 8 * 18 g = 144 g
mass of Ba(OH)2 = 171.3 g
total mass: 144 g + 171.3 g = 315.3 g
percentage of water: (144 g / 315.3 g) * 100% = 45.67%