Using a graduated cylinder, you measure out 250 mL ethanol, which has a density of 0.789 g/mL You transfer this to a previously tared beaker and measure the mass. Repeating this process three times, you obtain the following measurements: • 195.31 8 • 194.78 8 • 194.62 g Report a calculation that indicates the accuracy of the data shown above. (Blank #1) Report a calculation that indicates the precision of the data shown above. (Blank #2) Based on your calculations for accuracy and for precision, do you think any errors occurred in obtaining the measurements? Explain your answer in 1-2 sentences. (Blank #3) Answer for blank # 1: Answer for blank # 2: Answer for blank # 3:

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A:

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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.