Solution to solve this problem , let
p1- students who saw the tree tourist spots
p2-those who visited coron only
p3-those who saw tubbataha reef olny
p4-those who joined El Nido trip only
p5-those who visited coron and tubbataha reef only
p6-those who joined the tubbataha reef and El Nido trip only
p7-those who saw coron and El Nido only
p8-those who did not see any of the tree tourist spots

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.

i wish i could but this one is weird give me abc and i can solve it.

answer: mole of the gas

answer: mole of the gasexplanation: