chapters 1-3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 1 Kg = ____ lb | 2.2 lb
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| 1 L = ____ qt | 1.06 qt
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| 1 meter = ____ in | 39.4 in
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| kilo | 1000 (10^3)
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| deci | 1/10 (10^-1)
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| centi | 1/100 (10^-2)
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| milli | 1/1000 (10^-3)
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| micro | 1/1000000 (10^-6)
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| 1 fl oz= ____ mL | 30mL
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| 1tsp = ____ mL | 5 mL
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| 1 tsp = ____tbs | 3 tbs
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| 1 food calorie = _____ chemical calories | 1000 chemical calories
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| matter is made up of | mixtures and substances
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| mixtures can be separated by physical* means into | substances
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| substances are either | compounds or elements
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| compounds can be separated by chemical* means into | elements
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| density = | mass/volume
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| typical units of density | g/mL
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| specific gravity= | (density of sample) / (density of water)
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| density of water | 1.00 g/mL
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| a.c | before meals
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| p.c. | after meals
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| ad lib | as needed
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| p.r.n. | when necessary
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| h.s. | hour of sleep, at bed time
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| stat | immediately, at once
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| q.d. | once a day, everyday
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| q.o.d. | every other day
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| b.i.d. | twice a day
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| t.i.d. | 3 times a day
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| q.i.d. | 4 times a day
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| min. | minute
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| h | hour
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| q.h. | every hour
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| q.2h | every 2 hours
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| q.____ h | every ____ hours
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| melting point of water | 0 c, 32 f
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| boiling point of water | 100 c, 212 f
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| F= | (9/5) c + 32
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| C= | (5/9)( f - 32)
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| observations of Dalton's atomic theory | A.Conservation of mass
B.Law of definite proportions
C.Law of multiple proportions
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| conservation of mass | mass of the products equals the mass of the reactants (no mass lost)
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| Law of definite proportions | any given compound contains its elements in a fixed proportion by mass
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| law of multiple proportions |
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| postulates of Dalton's atomic theory A) | A)chemical elements are made of atoms that persist unchanged and indestructible through all chemical change
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| postulate B) | B) all atoms of a given element have the same mass(now we know that this is not entirely true
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| Postulate C) | C) chemical compounds contain integral numbers of atoms of the component elements
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| isolated atom has the shape of a ______ | sphere
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| charge of p, n, e | p(+)
E(-)
N(0 charge)
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| which are located in the nucleus | protons and neutrons
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| volume of cell occupied by the _____ is much larger | electrons
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| which two parts of an atom have the same mass | neutron and proton
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| most of the mass of an atom is in its ______ | nucleus
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| in an isolated atom atomic number = _____ =__________ | number of protons = number of electrons
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| total number of particles in the nucleus = | mass number (protons + neutrons)
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| isotopes | two atoms of the same element with different numbers of neutrons(same atomic number but different mass numbers)
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| average (weighted average) atomic mass | (.9963)(14.00307u)+ (.0037)(15.00011u)= 14.01u
(percent occuring/100)(atomic mass of isotope)
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| thermal energy is associated with | the movement of particles
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| 1 calorie(cal)=______J | 4.184 Joules
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| 1 kcal=______ cal 1 kJ = ______ J | 1000 cal
1000 J
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| pure substances can be | comounds or elements
fixed or constant composition
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| the simpelest type of pure substance is | an element
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| a compound is | two or more elements chemically combined in the same proportion, atoms held together by bonds forming small molecules
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| pure substances cannot be broken down through _________means | physical
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| a mixture is | 2 or more substances physically mixed but not chemically combined
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| homogeneous mixture | composition is uniform throughout the sample, also called a solution
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| heterogeneous mixture | components do not have a uniform composition
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| mixtures can be broken down through ___________ means | physical
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| during a change of state temperature remains | constant
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