Answer:
NaH one atom of sodium react with one hydrogen to form sodium hydride
Explanation:
 
        
             
        
        
        
I don’t see anything. So sorry
        
                    
             
        
        
        
<u>Answer:</u> The temperature to which the gas in the syringe must be heated is 720.5 K
<u>Explanation:</u>
To calculate the volume when temperature and pressure has changed, we use the equation given by combined gas law.
The equation follows:

where,
 are the initial pressure, volume and temperature of the gas
 are the initial pressure, volume and temperature of the gas
 are the final pressure, volume and temperature of the gas
 are the final pressure, volume and temperature of the gas
We are given:

Putting values in above equation, we get:

Hence, the temperature to which the gas in the syringe must be heated is 720.5 K
 
        
             
        
        
        
A change of 1 Kelvin is exactly the same as a change of 1 degree Celsius.