Answer:
Oxygen, Carbon, Hydrogern, Nitrogen, Sulfur, and Chlorine are all non-metals
Calcium, Potassium, Sodium, and Magnesium are all metals
Explanation:
One mole Hydrogen need 1/2mol O_2 .
Moles of Hydrogen
Moles of O_2
Answer:

Explanation:
Hello,
In this case, for the dissociation of the sodium hydroxide into sodium and hydroxyl ions we have:

Which is a 100% dissociation as sodium hydroxide is a strong base, therefore, the concentration of the hydroxyl ions are 1.0x10⁻⁹. For that reason, the pOH could be computed as:

Finally, from the definition of pH, we have:

Best regards.
Answer:
First one is 5.0 M ammonia and the Second one ?
Explanation:
Petroleum is a significant source of US greenhouse gas emissions.