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CHEM1203 TEST 1
chapters 1-3
| 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 |
Created by:
rlongss
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