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.
1. Knowing that one day is 24 hours and one hour is 60 minutes, how many minutes are in 2.0 days?
2. How many liters is 57.4 mL?
3. Calculate the grams of ethane present in a sample containing 0.3850 moles if the molar mass of ethane is 30.067 g/mol.
4. Calculate the moles of ammonia present in a 7.040 g sample of ammonia, which has a molar mass of 17.030 g/mol.
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Calculate the moles of ammonia present in a 7.040 g sample of ammonia, which has a molar mass of 17.030 g/mol.
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