Ammonia and potassium iodide solutions are added to an aqueous solution of chromium(III) nitrate. A solid is isolated (compound A) and the following data are collected: When 0.105 g of compound A was strongly heated in excess oxygen, 0.0203 g of chromium(VI) oxide was formed. In a second experiment it took 32.93 mL of 0.100M HCl to titrate completely the ammonia present in 0.341 g of compound A. Compound A was found to contain 73.53% iodine by mass. The freezing point of water was lowered by 0.62oC when 0.601 g of compound A was dissolved in 10.00 g of water.   What is the formula of the compound A?

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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.