Identify the group of ONLY nonmetals. a
aluminum, silicon, phosphorous, sulfur
b
hydrogen, helium, lithium, beryllium
c
aluminum, germanium, arsenic, silicon
d
neon, carbon, nitrogen, oxygen

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.