The combustion of 0.0222g of isooctane vapor, c8h18(g), at constant pressure raises the temperature of a calorimeter 0.400 degrees c. the heat capacity of the calorimeter and water combined is 2.48kj/degrees c. find the molar heat of combustion of gaseous isooctane.

Asample of neon occupies a volume of 375 ml at stp. what will be the volume of neon if the pressure is reduced to 90.0 kpa? a. 422 ml b. 422 l c. 333 ml d. 333 l

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

The point along a planet's orbit where it is closest to the sun is called the