A 500.-L sample of oxygen gas at 24 °C was
prepared by decomposing a 3.0% aqueous
solution of hydrogen peroxide, H²O² in the
presence of a small amount of manganese
catalyst by the reaction
2H²0²(aq) › 2H²0(g) + 0²(g)

The oxygen thus prepared was collected by
displacement of water. The total pressure
collected was 755 mm Hg. What is the partial
pressure of oxygen in the mixture? How many moles of oxygen are in the mixture? (The vapor pressure of water at 24°C is 23 mm Hg.)

just did the assignment and the answer was #1 +2 n

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.