Is a humidifier putting moisture into the air a physical or chemical change and why?

What is the heat in joules required to convert 75.0 grams of water into steam if the ^Hvap of water is 2257j/g?

Logging trees is often controversial. Why would some people support logging and some people not support logging?

What device is often used to locate primer and gunpowder particles by their characteristic size and shape?

Which agent of erosion is mainly responsible for the formation of the depressions occupied by the finger lakes and kettle lakes found in NYS? alior

A 15.0 kg chunk of ice falls off the top of an iceberg. If the chunk of ice falls 8.00m to to the surface of the water, what is the kinetic energy of the chunk of ice when it hits the water, and what is its velocity

In Flask A, you reacted 7.23 g Mg with 1.05 mol HCl. In Flask B, you reacted 1.22 g Mg with 1.35 mol HCl. Which balloon will inflate the most?

I have 2 electrons is the first shell, 8 in the second, and 6 in the third

The production of plastics makes life, so it benefits society. On the other hand, the production of plastics causes air and water, so it also harms society.

The total number of moles represented by 20 grams of CaCO3 is

Particles of matter how have both potential and kinetic energy is that true or false?