Suppose a student places a beaker on his balance and does not tare it. Then, he adds three substances to the same beaker. The table shows the student's data before and after he adds each substance. Before After distilled water 57.160 g 70.990 g sodium acetate 70.990 g 73.980 g acetic acid 73.980 g 75.020 g What is the mass of the beaker? mass of the beaker: g What is the mass of sodium acetate? mass of sodium acetate:
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.
Suppose a student places a beaker on his balance and does not tare it. Then, he adds three substances to the same beaker. The table shows the student's data before and after he adds each substance.
| Before | After | |
|---|---|---|
| distilled water | 57.160 g | 70.990 g |
| sodium acetate | 70.990 g | 73.980 g |
| acetic acid | 73.980 g | 75.020 g |
The data given is,
| Before | After | |
|---|---|---|
| distilled water | 57.160 g | 70.990 g |
| sodium acetate | 70.990 g | 73.980 g |
| acetic acid | 73.980 g | 75.020 g |
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