Achemist heats 100.0 g of feso4 x 7h2o in a crucible to drive off the water. if all the water is driven off, what is the mass of the remaining salt?

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

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)