Aj-in-diameter water pipe is 60 ft long and delivers water at 5 gal/min at 20°c. what frac- tion of this pipe is taken up by the entrance region?

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

Idon't know hope someone you

The answer is nitrogen-containing bases