Atomic Mass Atoms are so small, it is difficult to discuss how much they weigh in grams. Use atomic mass units. an atomic mass unit (amu) is o
Each element on the periodic table has an atomic mass -- an approximation of the mass of a single atom of that element. Because atoms are so small, a specific unit is used to measure the mass of small quantities of atoms. Very large quantities of atoms a
Chemistry is full of many different confusing conversions. These conversions are important because they ultimately allow us to discover how a particular atom or molecule will interact with other atoms and molecules. Central to chemical conversions is the conversion of grams to moles, and vice versa....
The pressure is high enough to force atoms of hydrogen to come together innuclear fusionreactions — something we try to emulate here on Earth. Two atoms of hydrogen are combined to create helium-4 and energy in several steps: Two protons combine to form a deuteriumatom(hydrogen atom with on...
In this gas, the atoms and molecules of the elements fly around freely, bumping into each other and everything else. As these particles collide against an object, each of them pushes with a tiny amount of energy. Because there are so many particles in the air, this energy adds up to a...
where C is carbon, H is hydrogen, O is oxygen, the hyphen is a single chemical bond between the atoms and the || symbol is a double bond between the atoms. For clarity, the bonds of the three hydrogen atoms to the left carbon atom are not shown. When ethanol is oxidized to acetic...
Once the chemist obtains the fungus, he has to carefully and precisely culture it to extract the ergot alkaloids (an alkaloid is a compound containing basic nitrogen atoms). The darkroom setup becomes necessary here, because the fungus will decompose under bright lights. In fact, LSD itself may...
ElementSymbolAtomsMass % Hydrogen H 1 2.8% Chlorine Cl 1 97.2% A mole is thus a collective number. It's similar to another collective number you may be familiar with: a dozen. A dozen can refer to anything: a dozen donuts is always twelve donuts, and a dozen flamingos is always twelve...
Calculate the molar mass by multiplying the number of atoms of each element in the compound (its subscript) times the atomic mass of the element from the periodic table. Molar mass = (2 x 1.008) + (2 x 15.999) Molar mass = 34.014 grams/mol Multiply the molar mass by the number of m...
This value on a periodic table is given inatomic mass units or amu, but for chemistry calculations, you usually write atomic mass in terms of grams per mole or g/mol. The atomic mass of carbon would be 12.01 grams per mole of carbon atoms. ...