The main substances in air are N2 (nitrogen), O2 (oxygen), CO2 (carbon dioxide), H2O (water), and Ar (argon). Which of these substances are elements? Which are compounds? Which are molecules?

Identify the Sl units of measurement for length (distance) and mass

The law of Conservation of Mass states that the total mass before and after a

Select all of the answers that apply. what are the two main ingredients in air? oxygen carbon dioxide nitrogen helium hydrogen

How many molecules of n2 are in a 200.0 ml container at 780 mmhg and 135∘c?

Which of these molecular shapes do you expect for the sf6 molecule? which of these molecular shapes do you expect for the molecule? linear trigonal planar tetrahedral trigonal bipyramidal octahedral?

What are two fungal skin infections that humans can contract? pneumonia and ergot disease ergot disease and athlete's foot athlete's foot and ringworm ringworm and pneumonia

A critical biotic factor in Yellowstone National Park is A) geographic isolation B) high elevation C) high temperature in the summer D) population of wolves E) proximity to water

If energy can neither be created nor destroyed in a chemical reaction, what can happen to the energy

Effect of ph on conformation of aplha helix

How can we tell when something is polar or non-polar in an Inter-molecular Force?