4 observations that suggest a chemical change is occurring

A pot contains 7 l of brine at a concentration of 80 g/l. how much of the water should be boiled off to increase the concentration to 200 g/l?

A 5 m long vertical tube having cross sectional area of 200 cm^2 is completely filled with water at room temperature. Calculate the mass of water present in the tube. Density of water at room temperature is 1000 kg/m^2

Briefly describe the water cycle

What Is the Connection Between Sulfuric Acid and Hydrochloric Acid?

The element of 2.345

What are not chemical properties of matter?!

Calculate the mass of water produced when 2.06 g of butane reacts with excess oxygen.

What describes color and streak?

What is a group of specialized cells called when they work together to perform a specific function?

What is the overall chemical equation for smog after the above intermediate reactions are combined?