Answer:
D. How frequently do earthquakes occur in San Francisco?
Answer:
Phosphorus
Explanation:
Group V elements- Nitrogen, Phosphorous
period 3- Sodium, Magnesium, Aluminium, Silicon , Phosphorous, Sulphur, Chlorine and Argon
Group v and period 3 is phosphorus
Many homeowners treat their lawns with CaCO3(s) to reduce
the acidity of the soil. The net ionic equation for the reaction of CaCO3(s)
with a strong acid, HCl (I chose HCl because it is a strong acid) is CaCO3(s) +2
HCl(aq) → CaCl2(s) + H2O(aq) + CO2(g).
