When the astronaut took this photo of Earth, what moon phase would have been visible in View from Earth? (astrology isn't a subject on here sorry)

What is the molar mass of potassium nitrate, kno3

Nitrogen dioxide decomposes according to the reaction 2 no2(g) ⇌ 2 no(g) + o2(g) where kp = 4.48 × 10−13 at a certain temperature. if 0.70 atm of no2 is added to a container and allowed to come to equilibrium, what are the equilibrium partial pressures of no(g) and o2(g)

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.