Please help 4NH3 + 5O2 > 4NO + 6H2O
How many moles of NO are produced from 9.32 grams of oxygen?

the answer is not 0.166 moles i tried and did not get credit for.

Forests and meadows are often cut down to make way for farms or large number of new homes. what are some of the elements of ecosystems that are lost when plants in these areas are removed?

Describe the interaction that occurs between two objects with the same electrical charge.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have