When sound is created, it travels to the ear through a compression. medium. rarefaction. surface.

One effect of some refrigerant gases in the atmosphere is that they:

What are the number of protons, electrons, and neutrons in Potassium

29.5 g of mercury is heated from 32°C to 161°C, and absorbs 499.2 joules of heat in the process. Calculate the specific heat capacity of mercury (in Jg°C).

This decomposition is first order with respect to phosphine, and has a half‑life of 35.0 s at 953 K. Calculate the partial pressure of hydrogen gas that is present after 70.5 s if a 2.20 L vessel containing 2.

If the value of the current increases by a factor of 2, what will happen to the resistance

For a particular collision, she detects the emitted products and find 15 protons, 2 antiprotons, 7 positrons, and 24 neutral particles. How many electrons are also emitted

Suppose you wanted to change the rate of a chemical reaction. what might you change in the reaction? explain the factor

Carbon-13 is an isotope of carbon. The atomic number of carbon is 6. How many neutrons does carbon-13 have?

What is the basic building block of matter to a chemist

Between magnesium and calcium, which has the highest ionization energy, and why?