It is an IXL question again, What do these two changes have in common? filtering air to remove dust and pollen
mixing sand and gravel
Select all that apply. It is multi answers: answer 1:Both result in a different type of matter than before. 2:both are caused by heating. 3:both are physical changes 4:both are chemical changes

It takes 945.kj/mol to break a nitrogen-nitrogen triple bond. calculate the maximum wavelength of light for which a nitrogen-nitrogen triple bond could be broken by absorbing a single photon.

What is happening when the water inside a kettle heats up and begins to boil

28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action