States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Exactly 75.00 mL of a 0.3132 M solution of Na2SO3 were treated with 150.0 mL of 0.4025 M HClO4 and boiled to remove the SO2 formed.
(a) What was the mass in grams of SO2 that evolved?
(b) What was the concentration of the unreacted reagent (Na2SO3 or HClO4) after the reaction was complete?
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