Why is it important to seal the mouth of the test tube

High-flying aircraft release NO Into the stratosphere, which catalyzes this process. When O3 and NO concentrations are 5 x 10^12 molecule/cm 3 and 2 x 10^9 molecule/cm3, respectively, what is the rate of O3 depletion?

Why is Avogadro's number referred to as a mole? If you could change this terminology, what would you change it to and why?

An elixir of ferrous sulfate contains 220 mg of ferrous sulfate in each 5 ml. if each milligram of ferrous sulfate contains the equivalent of 0.

What method can be used to separate mixtures

What is an element? 1) A chemical that cannot be separated, but is limited in supply 2) A chemical that can be broken down or separated into other chemicals 3) One or more molecules held together by chemicals 4) Two or more atoms held together by

What are some examples of not all liquid's evaporating at the same rate?

Suppose you went bowling, but instead of a bowling ball you rolled a ping pong ball down the alley. What do you think would happen?

Which expression represents the ΔH for a chemical reaction in terms of the potential energy, PE, of its products and reactants?

Identify the element that has a ground state electronic configuration of [ar]4s23d104p 3.

A geneticist has discovered a new compound that is made up of a small number of identical subunits. The subunits are joined end to end in long chains. Based on this information, what best can be concluded about these subunits? A. They are ketones. B.