Please help All of these are examples of intensive properties of matter EXCEPT:

A. hardness
B. volume
C. malleability
D. color​

Complete the sentence. the lower the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 0

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

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: