Consider an iron bar on a balance weights 75.0g. As the iron bar rusts, which of the following is true? Explain your answer. The balance will read less than 75.0 g. The balance will read 75.0 g. The balance will read greater than 75.0 g. The balance will read greater than 75.0 g, but if the bar is removed, the rust is scraped off, and the bar replaced, the balance will read 75.0 g.
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.
Consider an iron bar on a balance weights 75.0g.
As the iron bar rusts, which of the following is true? Explain your answer.
- The balance will read less than 75.0 g.
- The balance will read 75.0 g.
- The balance will read greater than 75.0 g.
- The balance will read greater than 75.0 g, but if the bar is removed, the rust is scraped off, and the bar replaced, the balance will read 75.0 g.
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