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            the methods of proper utilization of machines
                    Answer is: 
                    
            (15, 15)
                    Answer is: 
                    
            Avagadros law
                            Explanation: 
                            
                                        
                                        
                Avagadro's Law states, "Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules."
Thus, according to Avogadro's law, 1 m3 of oxygen (O2) will contain the same number of molecules as 1 m3 of hydrogen (H2) when the temperature and pressure is the same.