Answer: Physical change
Explanation: Quite simple as the starfish opening a clam would mean the starfish is physically changing the clams look.
Answer is: 10 moles of water will be produced.
Balanced chemical reaction of formation of water:
2H₂ + O₂ → 2H₂O.
n(H₂) = 10 mol; amount of hydrogen gas.
From balanced chemical reaction: n(H₂) : n(H₂O) = 2 : 2 (1 : 1).
n(H₂O) = n(H₂).
n(H₂O) = 10 mol; amount of water.
Answer:
D
Explanation:
Because jwbahaggagqhhwjwjja
False- Strontium will need to lose two valence electrons to make its second-highest energy level be its valence energy level (being filled with an octet of electrons) and possess a more stable electronic arrangement. In order to do so, a single oxygen atom must be available, as both strontium valence electrons will be gained by the single oxygen atom.