First off, the chemical equation needs to be balanced. Since there are 2 oxygen atoms in the reactants, we must produce 2 moles of MgO, which means we need 2 moles of Mg, giving:
2Mg + O2 --> 2MgO
Therefore for a stoichiometric reaction where no reactant is left over, the number of moles of magnesium must be double that of oxygen. However, as seen, the molar ratio of magnesium to oxygen is 2:5, meaning oxygen is in large excess, and Magnesium is the limiting reactant. Therefore the answer is A.
Krypton is in group 18, and so it has 8 valence electrons. B is the answer
Answer:
Condensation and Depositon
Explanation:
Condensation is from gas to liquid
Deposition is from gas to solid
Answer:
most likely water
Explanation:
most likely it is water, however pressure plays a role, if you are at sea level the boiling point of water is 100°C but if you are on Mt. Everest it is 71°C, assuming she is slightly above sea level it is water.
Answer:
The answer to your question is:
Explanation:
Butane (C₄H₁₀) Compound It's composed by C and H
Dodecane (C₁₂H₂₆) Compond It's composed by C and H
Octane (C₈H₁₈) Compound It's composed by C and H
Benzene (C₆H₆) Compound It's composed by C and H
Oxygen (O₂) Element It's only oxygen
Carbon dioxide (CO₂) Compound It's composed by C and O
Water (H₂O) Compound It's composed by H and O
Gasoline Mixture It's composed by many hydrocarbons
Kerosene Mixture It's a mixture of hydrocarbons