Gastric acid pH can range from 1 to 4, and most of the acid is HCl.

For a sample of stomach acid that is 1.71×10−2 M in HCl, how many moles of HCl are in 13.1 mL of the stomach acid?

Express the amount to three significant figures and include the appropriate units.

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.

answer7,570,82356 cubic centimeters;

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.