How many moles of iron are present in 3.15 × 1024 atoms of iron?

Valence electrons are electrons located

What unit of temperature is used in gas law calculations?

A tank contains a mixture of helium, neon, and argon gases. If the total pressure in the tank is 490. mmHg and the partial pressures of helium and argon are 215 mmHg and 102 mmHg, respectively, what is the partial pressure of neon?

How many kcal are produced when 32.0 g of CH4 react?CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) + 218 kcal

Given the following equation, what is the correct form of the conversion factor needed to convert the number of moles of O2 reacted to the number of moles of Fe2O3 produced?4Fe(s) + 3O2 (g) → 2Fe2O3(s)

The ammonia molecule, NH3, is

When an atom of uranium-235 is bombarded with neutrons, it splits into smaller nuclei and produces a great amount of energy. This nuclear process is called

Which of following cellular structures increases surface area for absorption on the apical surface of a membrane tissue? 

You are carrying a box from your house to your car.  In order to maintain tension, you must [A] motor units.   Your friend comes up and adds items to the box you are carrying.  In order to maintain tension, you must [B] motor units.