How many grams of oxygen are needed for the complete combustion of 11.2 liters of propane, C3H8?
C3H8 + 5 O2 →3 CO2 + 4 H2O

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

Which of the following units is not an official si unit? mole liter kilogram ampere

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.