Answer:
The term living refers to a thing or things that once was living or was and passed and non living thing is anything that was never alive basically was just their but couldn't do such mover or talk ex:in order for somthing to be classified as living must grow and develop and use energy and reproduce be made up of cells respond to its environment and adapt to living things easier to understand when seeing them in person but thats the answer let me know if I helped peace ✌ ☺ 
 
        
             
        
        
        
Hydrogen is the lightest element on the periodic table of  elements. Hydrogen gas is always bonded to itself or something else to fill its outer shell. That is why hydrogen gas is represented as H2. Hydrogen<span> is odorless, colorless, and tasteless; therefore, it is undetectable by human senses.</span>
        
                    
             
        
        
        
Answer:
Don't ever blame yourself for their decisions your just keep your head up and look at the positive things 
 
        
                    
             
        
        
        
Answer:
 1.6896 grams
Explanation:
Given that:
Total pressure = The pressure of   + partial pressure of
 + partial pressure of 
∴
The pressure of   = Total pressure - partial pressure of
  = Total pressure - partial pressure of 
= (754.8 - 17.55) mmHg
= 737.25 mmHg 
At standard conditions:
1 mmHg = 0.00131579 atm
∴
737.25 mmHg will be: (737.25*0.00131579) atm = 0.970065928 atm
P ≅ 0.97 atm
The temperature  (T) = 293 K 
Volume (V) = 1.31 L
Using ideal gas equation
PV = nRT
0.97 × 1.31 = n × 0.0821 × 293

n = 0.0528
mass of oxygen   = no. of moles * molar mass
 = no. of moles * molar mass
= 0.0528 * 32
= 1.6896 grams