Answer:
 Kelvin
Explanation:
As we know that 

Where P is the pressure in atmospheric pressure
T is the temperature in Kelvin  
R is the gas constant  
V is the volume in liters

Substituting the given values in above equation, we get - 

On rearranging, we get 

 Kelvin
 
        
             
        
        
        
Answer:
Identifying whether or not an element is an ion is a very simple process. Identify the charge of the element. ... The number of electrons is equal to the atomic number minus the charge of the atom. Refer to an element with either a positive or negative charge as an ion.
 
        
             
        
        
        
Answer:
4.52×10^24
Explanation:
N = n × Na
where; N = no. of bananas
n = no. of moles
Na = Avogadro's constant
Which is 6.02×10^23
N = 7.5 × 6.02×10^23
N =4.515×10^24
 
        
             
        
        
        
Answer:
the first option, tasting a pasta sauce after adding a new ingredient.
Explanation:
tasting a pasta sauce after adding a new ingredient is not an observation because there is no qualitative or quantitative data to be taken from that experience.