Moles, Chemical Equations, Physio Solutions

Question 1

Atom Def.

Answer 1

Basic unit of an element, smallest element part to undergo chemical reaction

Question 2

Molecule Def.

Answer 2

Aggregate of at least 2 atoms in definite arrangement held together by chemical forces. Contains atoms of 1+ different elements

Question 3

Diatomic Molecule

Answer 3

Contains 2 atoms

Question 4

polyatomic molecule

Answer 4

contains 2+ atoms

Question 5

Molecular Formula

Answer 5

Exact number of atoms of each element in a molecule

Question 6

Atomic Mass Unit Definition

Answer 6

1 amu = one twelfth the mass of 1 carbon 12 atom

Question 7

average atomic mass definition

Answer 7

Weighted average of all naturally occurring isotopes of an element

Question 8

Chemical Reactions (def.)

Answer 8

Process where a substance is changed into 1 or more new substances.

Question 9

Mole def.

Answer 9

Amount of a substance that contains as many elementary entities as atoms in 12g of Carbon12

Question 10

Avogadro’s Number

Answer 10

6.022 x 10^23

Question 11

Molar Mass (def.) g/mol

Answer 11

Mass in grams of 1 mole of molecules/atoms

Question 12

Solutions (def.)

Answer 12

Homogenous mixture of 2 or more substances. Formed in any state (solid/liquid/gas)

Question 13

Concentration Def.

Answer 13

Amount of solute present in given amount of solvent

Question 14

Dilute Solution Def.

Answer 14

Contains relatively little solute in large quantity solution

Question 15

Concentrated Solution Def.

Answer 15

Contains relatively large solvent in qiven solution quantity

Question 16

2 Ways of working out quantitative concentrations

Answer 16

% Conc. (eg clinical reports, medicine, I.V.) + Molar Concentration (molarity)

Question 17

I.V.

Answer 17

Giving substances directly into a vein when patient can’t swallow/ medication would be destroyed in alimentary canal

Question 18

Isotonic def.

Answer 18

2 substances with the same ratios of solute to solvent (no osmosis). Eg 5% w/v glucose and plasma

Question 19

Example of something measured in mg %

Answer 19

Blood urea nitrogen (BUN) levels

Question 20

Reasons for elevated BUN levels

Answer 20

Impaired renal function, dehydration, excessive protein intake/ catabolism

Question 21

Example of p.p.m. Use

Answer 21

Concentrations of toxic metals in drinking water