Ammonia (NH3) dissolved in water is heated in a
beaker. If initially there had been 60 grams dissolved
in 100 grams of water, what would happen if the
temperature reached 90°C and why? (AKS 60 DOK 2)

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3

Why is it incorrect to balance a chemical equation by changing the subscripts? explain.