Albe Which is the best use of punctuation?
Many people are squeamish around, insects, and rodents.
Our instructor taught us techniques (to help us) master welding.
Upon hearing her diagnosis, she was filled with one emotion: relief.
The children in her afterschool class tend to be immature (and silly).

n+h→nh3

we must remember that nitrogen and hydrogen are both diatomic molecules in their standard gas form. this adjusts the equation to

n2+h2→nh3

now we need to adjust coefficients in order to balance the atoms on each side of the equation. currently we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.

we can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.

n2+3h2→2nh3

this gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.

introduction of a drug directly into the respiratory tract is a form of inhalation administration.

the role of the microscope world in creating new materials .