Question

Mikayla says that air is an element since it has oxygen in it. Jose says that air is a mixture because each part of air keeps its properties. Grant says that both Mikayla and Jose are wrong, because air is a compound. Who is correct and why?

A) Only Jose is right because air is made of different kinds of molecules that each keep their own properties.
B) None are correct since air is a molecule and a pure substance.
C) Mikayla is correct because air is made of oxygen which is on the periodic table.
D)Grant and Jose are both right because air is a mixture and a compound since it has different elements in it.

Answer 1

A: Only Jose is is right because is made of different kinds of molecules that each keep their own properties.

Explanation: Air is a mixture of gaseous that makes up the earth's atmosphere it has various molecules that has its own properties:

• Nitrogen 78%    
• Oxygen 21%

• Water vapor (variable)

• Argon 0.9%

• Carbon dioxide 0.04%

• and many trace gases.