If a sample of nitrogen gas (n2) contains 3.0 x 10^24 atoms of nitrogen, then about how many moles of nitrogen gas are in the sample?

a. 5.0
b. 2.5
c. 3.0
d. 1.0

2.5

Explanation:

The guy above me is wrong, I know it because I took the test and it's not 5.0

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.