Element. Everything is else is a mixture, therefore not pure.
Answer:
D
Explanation:
sound waves can not be carried in space
Answer:
C
Explanation:
You mix different thing together to make a new thing.
Answer: n=15.56moles
Explanation:
PV = nRT
where
P is pressure in atmospheres
V is volume in Liters
n is the number of moles of the gas
R is the ideal gas constant = given as (0.0821L -atm/k-mol
PV = nRT
n= PV/RT
n= (1.5 X 230)/ (0.0821 X 270)
n= 15.56 moles
I'm not sure, but maybe burning point...
