Ideal gas is defined as hypothetical gas that fits all the assumptions of the kinetic-molecular theory. There are several assumption statement that apply to the behavior of an ideal gas, First Gases consist of larger number of tiny particles that are far apart relative to their size, Second, collisions between gas particles and between particles and container walls are elastic collision, third, gas particles are in rapid, random motion and continuous, Fourth, the temperature of a gas depends on the average kinetic energy of the particles of the gas.
        
                    
             
        
        
        
Hexane is a type of hydrocarbon that consists of six carbon atoms surrounded by 14 hydrogen atoms
 
        
             
        
        
        
Answer:
The claim is untrue.  
Explanation:
Given the information from the question. We need to evaluate the claim.
According to the phase rule we have F= C-P+2
In this particular situation, the forms are completely allotropic .In order words, they are conjured through the same chemical composition. Thus constituents C= 1, P=4 for four phases and the number variables is 2. As a result, F= C-P+2 =1-4+2= -1. Therefore, the claim is untrue.  
 
        
             
        
        
        
Explanation:
For the given compound: (s)-3-iodo-2-methylnonane, only third carbon- atom (marked with red dot) is the chiral atom (as it is attached to 4 different substituents), so the configuration will be assigned to this C-atom only.
In assigning the configuration of this compound, the priorities are assigned based on their atomic masses. The lowest priority group ( that is Hydrogen) should lie on the vertical line. But here, it is lying on the horizontal line, so the configuration will be reversed.
The configuration coming out when H is on the horizontal line is R, but the actual configuration will be S.
The structure of the given organic compound is shown in the image attached.
 
        
             
        
        
        
A. Coal produces the most carbon dioxide. The answer is A.