What do you mean do you need hekp?
Answer:
Intensive properties can be used to help identify a sample because these characteristics do not depend on the amount of sample, nor do they change according to conditions.
Explanation:
Intensive properties are bulk properties, which means they do not depend on the amount of matter that is present. Examples of intensive properties include:
Boiling Point
Density
State of Matter
Color
Melting Point
Odor
Temperature
Refractive Index
Luster
Hardness
Ductility
Malleability
Hello!
To know how many moles of iron can be recovered from 100 kg of Fe₃O₄ we'll need to use the
molar mass of Fe₃O₄ and apply the conversion factor to go from kg of Fe₃O₄ to moles of Fe in the following way:

So, theoretically, one could recover
1192,68 moles of Fe from 100 kg of Fe₃O₄
Have a nice day!
Answer:
The number of Aluminium atoms present in per cubic meter is
Explanation:
Given the density of Aluminium
is 
And the atomic weight of Aluminium
is 
Also, the Avogadro's number
is 
We need to find the number of atoms per cubic meter 

Plug the given values in the formula we get,


So, the number of Aluminium atoms present in per cubic meter is
The fourth one is correct yw