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Enthalpy of a Gas

The enthalpy of a system of gas is dependent on which of the following?

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Tough Like A Diamond

The hardest substance known is diamond. Which best describes the structure of diamond?

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Nucleus Therapy

Which of the following is the process by which an unstable nucleus is transformed into a more stable nucleus with lower energy?

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Charge of Iron

Which of the following is the charge of iron in the compound, Fe(SO4)2?

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C-N Bond Differences

How does the C-N bond in CN-1 differ from the C-H bond in CH4?

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Gas Compression

A 1 mol sample of ammonia gas (NH3) at 1 atm and 273 K is compressed to 2 atm. What is the difference in volume before and after compression?

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Photo attributed to Rudolf_Schuba.

Cyanide Ion

The cyanide ion has which of the following molecular geometries?

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Photo attributed to melburnian.

Molar Mass

If 45.1 grams of a solute is added to 302 grams of water to make a 0.65M solution, what is the molar mass of a solute?

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Lowest Penetrating Power

Which of the radioactive decay particles have the lowest penetrating power?

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Administering Nitrous Oxide

One of the tanks that a pediatric dentist uses to administer nitrous oxide is “empty”, meaning that the N2O inside is at the same temperature and pressure as the room. The ML-6 type cylinder has an internal volume of 165 liters. How many moles of nitrous oxide remain in the empty tank (Ideal gas constant = 0.082 L atm/K mol; assume the apparatus is at sea level; the ambient temperature is 22° C)?

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Photo attributed to Jurvetson.