An impure sample of Na2 SO4 has a mass of 1.56 g. This sample is dissolved and allowed to react with BaCl2 solution. The precipitate has a mass of 2.15 g Calculate the percentage purity of Na2 SO4 in the original sample.

Which substances have the lowest melting points: ionic covalent, or metallic

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Which of the following is most likely true about water in chemical solutions?