<span>Phosphorus trifluoride (formula PF3), is a colorless and odorless gas. is similar to carbon monoxide and this is very toxic according to my research. hope this helps.</span>
Metals have high density. They are always solids at room temperature.
Metalloids have intermediate density. They are generally solids at room temperature.
Non-metals have low density. They can be solids, liquids or gases at room temperature.
Based on this, the <span>class of elements that includes all of the elements that are gases at room temperature is the non-metals</span>
1 mole ------------ 6.02x10²³ molecules
? moles ----------- 9.0345x10²⁴ molecules
( 9.0345x10²⁴) x 1 / 6.02x10²³ =
9.0345x10²⁴ / 6.02x10²³ => 15.007 moles
