Buna ! Cine ma poate ajuta ? O gospodină pentru a prepara murăturile are la
dispoziție 1l soluție de oțet (acid acetic în apă )
de concentrație 9%(ρsol.=1.1g/cm cub).
Ce volum de apă trebuie să adauge pentru
a obține o soluție de oțet de concentrație 6% de
care are nevoie

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced. be sure your answer has the correct number of significant digits.

If two objects at different te, peraure are in contact with each other what happens to their temperature

The ammonia molecule in the diagram has the observed bond orientation because