Pure air is a mixture of several gases that are invisible and odorless. Consists of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide.
Answer:
hypothesis
Explanation:
a question that can be answered wity a hypothesis is a question a scientist can answer
It obtains a neutral pH (7). The combination of a strong acid and a strong base results in a neutral pH. The pH of HCl is about 1, and the pH of NaOH is 14.
Answer:
Pb(NO3)2 + 2NaCl = 2NaNO3 + PbCl2
