- Study guides, Class notes & Summaries

Compounds can be separated into elements by __________________ - correct answer chemical changes Mixtures can be separated by ______________ - correct answer physical changes Filtering separates particles based on differences in __________________ - correct answer particle size Distillation separates mixtures based on differences in ______________________ - correct answer boiling point Chromatography separates mixtures based on differences in _________________ - c...

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14 pages

Written in 2023/2024

Grade A+

Rechga

why do we perform iodometric titrations - correct answer to find the concentration of an unknown by mixing it with a solution of known concentration What are the 4 (general) steps of an iodometric titration? - correct answer combine solutions, reach endpoint, calculate, determine the concentration of the unknown What reaction takes place during an iodometric titration? - correct answer oxidation-reduction reaction what is used as the oxidizing agent in an iodometric titra...

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14 pages

Written in 2023/2024

Grade A+

Rechga

Environmental Chemistry - correct answer The origin, transport, reactions, effects and fates of chemical Species in the five spheres of environment Five Spheres of Environment - correct answer 1) Atmosphere 2) Hydrosphere 3) Geosphere 4) Biosphere 5) Anthrosphere Isotopes - correct answer Atoms with same number of protons but different number of neutrons in their nuclei Covalent bond - correct answer Atoms are joined by sharing two electrons Intermolecular for...

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17 pages

Written in 2023/2024

Grade A+

Rechga

Galvanic Cell Electrolytic Cell - correct answer Two basic types of Electrochemical cell Galvanic Cell - correct answer as the electrons are connected, there is a spontaneous flow of electrons. This reaction continues until one of the chemical components is depleted, at which point the cell is "dead" Electrolytic Cell - correct answer A galvanic cell can be built from what External Electromotive Force E - correct answer Current force may be force to pass through a...

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2 pages

Written in 2023/2024

Grade A+

Rechga

precipitation reaction - correct answer occurs when 2 aqueous solutions are mixed and a solid product forms complete ionic equation - correct answer shows all ionic substances in a reaction as ions spectator ion - correct answer becomes the precipitate in double replacement reactions net ionic equation - correct answer includes only those substances that undergo a chemical change during a reaction solubility rules - correct answer used to determine an aqueous...

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2 pages

Written in 2023/2024

Grade A+

Rechga

Less acidic gastric secretions in infants affect the absorption of medications administered T/F - correct answer true Which of the following is true concerning the elderly? - correct answer the elderly show a decrease in the ability to maintain homeostatic mechanisms Dramatically increases under conditions of inflammation and infection - correct answer CRP Elevated bound PSA is indicative of - correct answer prostate cancer % fPSA improves specificity for prost...

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5 pages

Written in 2023/2024

Grade A+

Rechga

Of the following, all are valid units for a reaction rate except ________. a. mol/hr b. g/s c. mol/L-hr d. M/s e. mol/L - correct answer e As the temperature of a reaction is increased, the rate of the reaction increases because the ________. a. reactant molecules collide less frequently b. reactant molecules collide more frequently and with greater energy per collision c. activation energy is lowered d. reactant molecules collide more frequently e. reactant molecules collide ...

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5 pages

Written in 2023/2024

Grade A+

Rechga

Place a star next to the reaction that should have a ΔS value closest to zero. Underline the reaction(s) that should have an increase in entropy. a) 2NO (g) + O2 (g) --> 2NO2 (g) b) 2NO2 (g) --> N2 (g) + 2O2 (g) c) 2H2O (l) --> 2H2 (g) + O2 (g) d) C2H4O2 (l) + CH4O (l) --> C3H6O2 (l) + H2O (l) - correct answer Starred: D Underlined: B & C Predict the sign of hte entorpy change for the following processes. a) Exhaled breath forms fog on a cold morning. _____________...

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12 pages

Written in 2023/2024

Grade A+

Rechga

Matter - correct answer Anything that has mass and takes up space Atoms - correct answer The building blocks of matter Molecules - correct answer Two or more atoms are joined in specific shapes Elements - correct answer Made up of the same kind of Atom States of matter - correct answer Gas liquid solid Gas - correct answer No defined shape or volume. Easy to compress Liquid - correct answer Definite volume. shape same as container. Hard to com...

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3 pages

Written in 2023/2024

Grade A+

Rechga

What is meant by a lead compound in medicinal chemistry? - correct answer A compound that acts as the starting point for drug design and development Which of the following needs to be established before the search for a lead compound takes place? - correct answer A bioassay There are several sources and methods of discovering new compounds. Which of the following is most likely to lead to the discovery of a complex structure quite unlike any other previously discovered? - correct...

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3 pages

Written in 2023/2024

Grade A+

Rechga

Oxidize - correct answer When a substance LOSES its electrons. Reduced - correct answer When a substance GAINS its electrons. Redox Reaction - correct answer The net reaction of oxidation and reduction. Oxidation and Reduction - correct answer Occur together in ONE reaction. Oxidizing Agent - correct answer A substance that gets reduced causes another substance to be oxidized. Reducing Agent - correct answer A substance that gets oxidized cause anothe...

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4 pages

Written in 2023/2024

Grade A+

Rechga

Acidic Solution - correct answer any solution in which the hydrogen-ion con- centration is greater than the hydroxide-ion concentration Amphoteric - correct answer a substance that can act as both an acid and a base basic solution - correct answer any solution in which the hydroxide-ion con- centration is greater than the hydrogen-ion concentration Conjugate Acid - correct answer he particle formed when a base gains a hydrogen ion; NH4 + is the conjugate acid of the ...

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2 pages

Written in 2023/2024

Grade A+

Rechga

Proton - correct answer (p⁺) a positively charged subatomic particle found in the nucleus of atoms. Isotope - correct answer A variety of atoms of an element; atoms of this variety have the same number of protons as all atoms of the element, but a different number of neutrons. Neutron - correct answer A neutral (uncharged) subatomic particle present in the nucleus of atoms. Photoelectric Effect - correct answer The release of electrons from a substance due to light...

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6 pages

Written in 2023/2024

Grade A+

Rechga

Define Thermochemistry - correct answer the study of energy changes that occur during a chemical reaction and changes in the state Define energy - correct answer the ability to work or produce heat Define temperature - correct answer a measure of the amount of kinetic energy an object/substance has measured in C or K Define Heat - correct answer thermal energy- energy that transfers from one object to another measured in joules (q) transfers because of difference...

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6 pages

Written in 2023/2024

Grade A+

Rechga

Earned Media - correct answer Which of the following media types is deemed "most credible" by consumers? Which media type would you use to realize the fastest short-terms gains? - correct answer Paid Media Websites, email, and blogs all fall under which category? - correct answer Owned Media The launch of browser software like Netscape and Internet Explorer is considered the start of the internet bubble because: - correct answer It enabled commercial businesses to ...

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11 pages

Written in 2023/2024

Grade A+

Rechga

301 Redirect - correct answer A method of redirecting a visitor from one web page to another web page. This type of redirect is to be used for permanent redirects. For example, you own websiteA.com and websiteB.com but you only want one website. You can 301 redirect all the traffic from websiteB.com to websiteA.com so that all visitors end up on websiteA.com 302 Redirect - correct answer A method of redirecting a visitor from one web page to another web page, used for temporary situ...

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20 pages

Written in 2023/2024

Grade A+

Rechga