CH, (g) + 2 O2 (g) --> CO2 (g) + 2 H20 (1) AH = -890.2 kJ; Calculate how many moles of water are formed when 121 kJ of energy are released in this
reaction.

A. 0.272 moles
B. 7.36 moles

Drug abuse will not lead to physical and psychological dependence. true or false ?

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

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.