What evidence of a chemical reaction might you see in rusting of an iron nail

A and B react together in this reversible reaction. A + 3B - -> C + 2D. A mixture of 10 mol of A and 10 mol of B were left to reach equilibrium. The equilibrium mixture contained 4 mol of B.

The ___ fluid compartment consists of fluid contained within all cells in the body and contains 2/3 of the body water in healthy adults.

A rock is thrown 1.8 meters in the air. Find out how fast it was thrown?

Three people are gathered around a campfire. One has his hands cupped around a ceramic mug of hot chocolate to warm them. Another is toasting a marshmallow above the fire. The third is roasting a hot dog above the glowing coals.

Explain why the appearance of gas is not always a sign of a chemical change

A sample of methane gas occupies 4.50 gallons at a temperature of 80.0 F. If the pressure is held constant, what will be the volume of the gas at 100. degrees C?

Jack wants to know if it takes longer for warm water to freeze into ice cubes than cold water, so he performed the following experiment. Jack placed 50 mL of water in the refrigerator and allowed it to cool to a temperature of 4°C.

How to calculate average concentration

Suppose that you measure a pen to be 10.5 cm long. Convert this to meters.

How are amounts of hydrogen and oxygen gas made from the electrolytic decomposition of water related to the chemical formula of water?