In the assay of a gas spirit, the gas that is liberated from a definite quantity of spirit and collected in a gas burette occupies a volume of 60.0 mL at a temperature of 25°C and a pressure of 700 mmHg. Assuming the gas is ideal, what is the volume at 15°C and 760mmHg? а. 33.16 ml b. 53.41 ml С. 33.16 liter d. 53.41 liter

Q: Calculate the molar mass of a gas that has a density of 1.428 g/L at STP.

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.