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