Which of the following is true of nonaneC9H20 which has a density of 0.79 g per milliliter melts at -51° Celsius and boils at 157° c? solid at room temperature
does not undergo combustion
floats on the surface of water
soluble in water
gas at room temperature​

it's filtration, but this is an assumption so my apologies if i got this

the answer is minerals.

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.