Find the specific heat of an unknown metal with an initial temperature of 16.celcuis when 3500 joules are applied to a 40.0 gram sample and the final temperature is 81.0 celciues

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?

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.

Which statement best describes the he properties of iconic compounds ?