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.
You have a chemical in a sealed glass container filled with air.
The setup is sitting on a balance as shown below. The chemical
is ignited by means of a magnifying glass focusing sunlight on
the reactant. After the chemical has completely burned, which of
the following is true? Explain your answer.
a. The balance will read less than 250.0 g.
b. The balance will read 250.0 g.
c. The balance will read greater than 250.0 g.
d. The scale's reading cannot be determined without knowing the identity of the chemical.
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