If after heating the reaction between magnesium and hydrochloric acid, the mass of the magnesium chloride and beaker is measured to be 38.28 g, what is the mass of magnesium chloride that was formed, if the mass of the beaker is 34.35 g. (ENTER ANSWER TO TWO DECIMAL PLACES)

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

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.

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.