When the pressure of a sample of gas is measured in a closed-end manometer, the mercury liquid is measured at a height of 31.6 cm. What is the pressure of the gas, in Pa

Calculate the number of molecules present in 0.750 mol of mgo.

Explain what happens at the saturation point when adding salt to water at room temperature.

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy