At 30°C, 90g of sodium nitrate is dissolved in 100g of water. Is this solution saturated,
unsaturated, or
supersaturated?

it is important to conserve water because there is very limited amount of freshwater here on earth and if we are not smart about how we use it we will only be runnning out of our supply faster than neccessarry.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.