Which chemical equation is unbalanced?
O C + O2 → CO2
O Sr + O2 → 2Sro
6H2 + 302 -> 6H20
O H2 + H2 + O2 → H2O + H2O

Which substance absorbs 58.16 kj of energy when 3.11 mol vaporizes? a)ch4 b)h2s c)co2 d)nacl

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.

What type of reaction fuels the processes seen here?