You leave a piece of bread outside for a few days. It forms green and blue mold. It smells awful. A chemical change has occurred - True or False?

Explain with facts

Problem Page What kind of intermolecular forces act between a formaldehyde molecule and a hydrogen sulfide molecule?

A 2.5600 gram sample of a sulfur-containing compound is analyzed by precipitating the sulfur as BaSO4. If 1.1756 g of BaSO4 are obtained, what is the percentage of sulfur in the sample?

There are 1.806 x 1025 molecules of water (H2O). How many moles of water does the sample contain?

A body, upon heating, becomes red first, then yellow, and then other colors. Why? A - Red light has the lowest frequency B - Yellow light has the lowest frequency C - Red light has the highest frequency D - None of the above

Use the terns atom and element to explain what makes sulver and gold different

An element x forms an iodide (xi3) and a chloride (xcl3). the iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2xi3+3cl2â2xcl3+3i2 if 0.5500 g of xi3 is treated, 0.2596 g of xcl3 is obtained.

When you kick a soccer ball across a field it will eventually come to a stop. Does this prove or disprove Newton's first law of motion? It disproves Newton's first law of motion because gravity is stronger than friction.

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

If a new substance is formed in a chemical reaction, what atoms do they consist of?

What is a scientific explanation for a range of hypotheses and observations supported by testing