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CHEM 111 Study Guide Questions & CORRECT Verified ANSWERS
CHEM 111 Study Guide Questions & CORRECT Verified ANSWERS
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CHEM 111 Study Guide Questions & CORRECTVerified ANSWERS |
law of chemical combination - ✔✔the smallest indivisible unit of the elements (atoms)
combined to form the smallest indivisible units of the compounds (molecules)
law of definite proportions - ✔✔regardless of how it is made a compound will always contain
the same proportion of mass as its ingredient
atomic theory of matter (Dalton's atomic theory) - ✔✔1. matter consists of indivisible atoms
2. all the atoms of a given chemical element are identical in mass and in other properties
3. different chemical elements have different kinds of atoms; in particular their atoms have
different masses
4. atoms are indestructible and retain their identities in chemical reactions
5. atoms of the elements combine with each other in small integer ratios to form compounds
diatomic molecule - ✔✔the simplest compound made from two different elements, that
contain one of each element
law of multiple proportions - ✔✔the compounds in some way are reacting in small integer
amounts
law of combining volumes - ✔✔the ratio of the volumes of any pair of gas reactants is the
ratio of simple integers
Avogadro's hypothesis - ✔✔equal volumes of different gases at the same temperature and
pressure contain equal numbers of particles
, electrochemical reactions - ✔✔reactions in which the passage of an electric charge produces
chemical changes
charge to mass ration - ✔✔the amount of charge necessary to produce 1 g of hydrogen from
the electrolysis of water
cathode - ✔✔negative terminal of a battery
anode - ✔✔positive terminal to the plate
electrons - ✔✔negatively charged particles
isotope - ✔✔an element with a different number of neutrons
mass spectrometer - ✔✔consists to three elements; a region in which atoms or molecules
are ionized and accelerated, on in which their flight paths are bent by magnetic forces, and a
detector that measures the ion current (used to find the percent of isotopes of elements)
relative molecular mass - ✔✔the sum of the relative atomic masses of the elements that
constitute it, each one multipleid by the number of atoms of that element in a molecule
mass number - ✔✔of a particular isotope it is the sum of the numbers of protons and
neutrons for isotopes
avogadro's number - ✔✔the number of atoms in exactly 12g of carbon
mole - ✔✔the amount that contains avogadros number of atoms, molecules or other
entities
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