Molecules and reactivity Samenvattingen, Aantekeningen en Examens

Chem Lab - Final Exam Questions & Answers Already Passed Three methods of separating compounds - ️️ Filtration, sublimation, evaporation Filtration - ️️ the process that separates a solid from the liquid in a heterogeneous mixture Sublimation - ️️ A change directly from the solid to the gaseous state without becoming liquid Evaporation - ️️ Removing a liquid from a mixture by turning it into a gas. Solve for the mass of a chemical in a container - ️️ [mass total] - [ma...

Life is characterized by a series of common properties. Which of the following is a property associated with life? a.) evolution by an individual b.) energy processing by creating energy from matter c.) adapting to the environment d.) Growth by internal changes correct answersd.) Growth by internal changes The molecular formula for glucose is C6H16O6. What would be the molecular formula for a polymer made by linking teen glucose molecules together by dehydration reactions? a.) C60H12...

Chem 219 Unit 4 Exam Questions With 100% Correct Answers What are the four halogen elements? - answerF, Cl, Br, I organohalide compounds - answerOrganic molecules containing halogen atoms (F, Cl, Br, I) Examples of how organohalide compounds are used by humans - answer- have been found in marine life (algae, mollusks, sponges, etc.), bc they metabolize the high concentrations of inorganic chlorides and bromides that are found in the seas. - Industrially, organohalides find uses as solvent...

OCR A LEVEL ORGANIC CHEMISTRY YEAR 12 WITH VERIFIED QUESTIONS AND ANSWERS What is the melting and boiling points of alkanes like? - ANSWER--as chain length increases so does the strength of the intermolecular forces as there is greater surface area for contact between molecules and hence stronger london forces and therefore the melting/boiling points are highr for longer chain. What is a structura/chain isomer? - ANSWER--Same molecular formula but a different structural formula Wh...

Ftce Biology 6-12 sample test questions 100% correct In an experiment measuring the growth of bacteria at different temps, id the independent variable - Correct Answer ️️ -Temperature A scientific theory is - Correct Answer ️️ -May be altered at a later time. Given a choice which is the most desirable method of heating a substance in the lab? - Correct Answer ️️ -Hot plate Biological waste should be disposed of - Correct Answer ️️ -In autoclave Chemicals should be stored -...

Chem 219 Unit 4 Exam Questions With 100% Correct Answers What are the four halogen elements? - answerF, Cl, Br, I organohalide compounds - answerOrganic molecules containing halogen atoms (F, Cl, Br, I) Examples of how organohalide compounds are used by humans - answer- have been found in marine life (algae, mollusks, sponges, etc.), bc they metabolize the high concentrations of inorganic chlorides and bromides that are found in the seas. - Industrially, organohalides find uses as solvent...

Ftce Biology 6-12 sample test questions 100% correct In an experiment measuring the growth of bacteria at different temps, id the independent variable - Correct Answer ️️ -Temperature A scientific theory is - Correct Answer ️️ -May be altered at a later time. Given a choice which is the most desirable method of heating a substance in the lab? - Correct Answer ️️ -Hot plate Biological waste should be disposed of - Correct Answer ️️ -In autoclave Chemicals should be stored -...

What are the group 1 metals known as? - Ans .The Alkali Metals Reactivity within the groups: - Ans .Alkali metals: reactivity increases as you go down, melting point/boiling point decreases as you go down Halogens: reactivity decreases as you go down and melting point/boiling point increases as you go down What properties do the group 1 metals have? - Ans .They all have similar properties as they all have one outer shell electron that is lost readily to form a +1 ion. They all have: ...

Once a drug reaches its target it must (blank 1) the target and vice versa and then (blank 2) to begin the process of producing the desired biological effect correct answer: Blank 1: recognize Blank 2: bind Chemical structure on drug action correct answer: drug structure, ionization, lipophilicity, reactivity, metabolism Acid/Base properties of drugs correct answer: If pH< pKa then group is protonated form If pH>pKa then group is in unprotonated form Sulfonic Acid correct a...

3 driving forces for a metathesis reaction 1. Precipitation 2. Gas 3. Formation of a weak or non-electrolyte 7 s trong acids - HCl = hydrochloric acid - HBr = hydrobromic acid - HI = hydroiodic acid - H2SO4 = sulfuric acid - HNO3 = nitric acid - HClO3 = chloric acid - HClO4 = perchloric acid Accuracy How close a measurement is to its true value Average X ̅ = (∑Xi )/n Boiling point The temperature at which the vapor pressure of the liquid equals the prevailing atmospheric pressure...