The first discovery, as opposed to first commercial application, of the water-soluble material used in contact lens is an example of:

What is the elment name for the following atoms? 18 protons, 20 neutrons, and 18 electrons

Which of these is an example of a chemical change? Deflating a rubber balloon Combining rubber with sulfur Stretching an elastic rubber band Erasing pencil marks from a page

The acceleration of the car with two washers added to the string would be

A sample of nitrogen gas in a 1.59-L container exerts a pressure of 1.47 atm at 26 ∘C. What is the pressure if the volume of the container is maintained constant and the temperature is raised to 371 ∘C?

For a material that contains n atoms, how many electron states will there be in a p band

Which of the following is not a source of air pollution related to human activities

Objects and substances in motion is I

If you were to remove an electron from a sodium atom that has eleven protons, what would be the electrical charge of the ion?

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom