a 10.0 l flask is used to collect 0.500 moles of n2 and 0.180 moles of o2 over water at 30°c. what is the pressure in the flask? (vapor pressure h2o(l) = 31.8 mm hg)
(need answer by tomorrow afternoon)

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at

Consider the reduction reactions and their equilibrium constants. cu+(aq)+e−↽−−⇀cu(s)pb2+(aq)+2e−↽−−⇀pb(s)fe3+(aq)+3e−↽−−⇀fe(=6.2×108=4.0×10−5=9.3×10−3 cu + ( aq ) + e − ↽ − − ⇀ cu ( s ) k =6.2× 10 8 pb 2 + ( aq ) +2 e − ↽ − − ⇀ pb ( s ) k =4.0× 10 − 5 fe 3 + ( aq ) +3 e − ↽ − − ⇀ fe ( s ) k =9.3× 10 − 3 arrange these ions from strongest to weakest oxidizing agent.

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as