F=ma, so 100=m×10. Solve for m by dividing by 10. The mass is 10 kg.
        
             
        
        
        
The temperature where vapour pressure equals atmospheric pressure is called BOILING POINT. This vapour pressure increases with rise in temperature. Also boiling point is different for different liquids. Hope I cleared your doubt...
        
             
        
        
        
<span>Agricultural waste used as a fuel is an example of biofuels, there already different kinds of  biofuels that came from agricultural waste, the most common are the biogas and bioethanol. biogas are produce when agricultural waste such as poultry manures and grassy waste are fermented to create biogas. while biothanol uses sugar rich agricultural waste to make ethanol</span>
        
                    
             
        
        
        
The chemical formula of a binary molecular compound of hydrogen and a group 7a element that can reasonably be expected to be less acidic in aqueous solution than HBr is HF
Group 7a that forms binary molecular compounds of Hydrogen are  Halogens such as Iodine I, Bromine Br, Chlorine Cl and Fluorine F. Out of these four HF is the least acidic. This is calculated based on Acid dissociation constant. HF has the least value out of these four, so it is the least acidic. 
A  binary molecular compound is a compound that consists of two non metals elements only.
Therefore, the chemical formula of a binary molecular compound of hydrogen and a group 7a element that can reasonably be expected to be less acidic in aqueous solution than HBr is HF.
To know more about binary molecular compounds
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