Given the reaction at equilibrium: A(g) + B(g) = C(g) + D(g)
At a constant temperature and pressure, an increase in the concentration of A(g) will cause
A A decrease in the concentration of B(g)
B An increase in the concentration of B(g)
A decrease in the concentration of D(g)
D A decrease in the concentration of C(g)
Need help asap 10 points

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.

The surface of the water droplet is held together by the attraction between molecules. in order for water to flow more easily into these small spaces, you need to decrease its surface tension. you can do this by adding soap, which is a surfactant (a material that decreases the surface tension of a liquid).

Melting increases as mass increases. since alkanes are not branched molecular structures, the one with the heavier mass will have higher melting point.  octane's mp > butane's mp