Tag Archives: chemistry

The Molecular Formula

If an unknown compound is found to have an empirical formula of CH4, which of the following is the molecular formula if the molar mass was determined to be 128 g/mol?

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Degrees of Unsaturation

How many degrees of unsaturation are present in the anxiolytic drug Valium (diazepam), molecular formula C16H13ClN2O?

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Final Oxidation Number

What is the final oxidation number of carbon in the following chemical reaction?

6CO2 + 6H2O -> C6H12O6 + 6O2

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Compound Boiling Point

Which of the following compounds would have the highest boiling point?

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Evaporative Cooling

Which of the following is an accurate explanation for evaporative cooling?

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Density of the Solid

If 7.000g of a solid displaced 21.0 mL of water when dropped into a graduated cylinder, what is the density of the solid?

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Ideal Gas Law

According to the ideal gas law at STP, which of the following is the value of the ratio between moles (assume 1 mole), the gas constant R, temperature and the pressure?

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Equation Balancing

Balance the following equation:

Butane + O2 -> H2O + CO2

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Inflated Balloons

Placing an inflated balloon in the freezer would result in which of the following?

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Average Kinetic Energy

If the temperature of a gas is quadrupled from 40K to 160K, which of the following accurately describes the change in the average kinetic energy of the gas?

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