Why is a mole of oxygen and a mole of oxygen gas a different molar mass?

Liquid nitrogen is very cold. At room tempature it changes into a gas. This is an example of: A) Evaporation B) Sublimation C) Melting D) Boling (Its not answer b)

A pure substance made of one kind of atom

What would happen if there were no neutrons in an atom?

How do you find the mass of original KClO3 sample

What is homogeneous mixture?

Does temperature change during a chemical reaction?

Understanding the high-temperature formation and breakdown of the nitrogen oxides is essential for controlling the pollutants generated by car engines.

A car driver accelerates to a speed of 35 mph and then takes her foot off the gas pedal. Even though she does not press the brake pedal at any time, she eventually rolls to a stop. Which of the following most likely causes the car to come to a stop?

A plasma-screen TV contains thousands of tiny cells filled with a mixture of Xe, Ne, and He gases that emits light of specific wavelengths when a voltage is applied. A particular plasma cell, 0.900 mm*0.300mm*10.0mm, contains 4.

Choose the answer that describes how density, pressure, and temperature would change if you could travel from the top of Earth's crust to the center of its core. А) Density and pressure would increase and temperature would decrease.