Halogen reactions Study guides, Class notes & Summaries
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AQA A-level CHEMISTRY 7405/1 AQA- QUESTIONS AND ANSWERS UPDATED 2024 FOR REVIEW EXAM 100% A+
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TOF steps - CORRECT ANSWER-1) ionisation 
2) acceleration 
3) ion drift 
4) detection 
5) analysis 
 
Electron impact - CORRECT ANSWER-Sample vaporised and electron gun fires high energy electrons at it which knock off 1 electron from each particle, making them 1+ ions 
NB- can knock off more than one e or break molecular ion 
 
electrospray ionization - CORRECT ANSWER-Sample dissolved in volatile solvent then injected through needle to give fine mist which is attached to positive end of high v...
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CHEM133 Week 7 Midterm Exam (Spring)
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1.	Question: Dry ice (carbon dioxide) changes from a solid to a gas at –78.5°C. What is this temperature in °F? 
2.	Question: The state of matter for an object that has both definite volume and definite shape is 
3.	Question: In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers? 
4.	Question: A piece of antimony with a mass of 17.41 g is submerged in 46.3 cm3 of water in a graduated cylinder. The water level increases t...
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chem 210 exam 3 with all questions correctly answered
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less 
the more s character a carbocation has, the _____stable it is 
 
 
 
the same as 
when looking at an epoxide, the orientation around the oxygen is _________ the orientation around the double bond in the reactant 
 
 
 
BrOH 
when added with base makes an epoxide 
 
 
 
Br2 
adds 2 Brs in anti conformation 
 
 
 
lindlar catalyst 
produces a Z alkene from an alkyne (adds 2 Hs in syn) 
 
 
 
add more electronegative atom, add pi bond 
2 ways of producing an oxidation reaction 
 
 
 
remove e...
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CHEM133 Week 7 Midterm Exam (Spring)
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1.	Question: Dry ice (carbon dioxide) changes from a solid to a gas at –78.5°C. What is this temperature in °F? 
2.	Question: The state of matter for an object that has both definite volume and definite shape is 
3.	Question: In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers? 
4.	Question: A piece of antimony with a mass of 17.41 g is submerged in 46.3 cm3 of water in a graduated cylinder. The water level increases t...
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CHM 1020 Exam 1 Latest Update Graded A+
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CHM 1020 Exam 1 Latest Update Graded A+ elements one of the 100 pure substances in our world from which compounds are formed 
compound pure substance made up of two or more different elements in a fixed, characteristic chemical combination 
mixture physical combination of two or more pure substances 
metal shiny elements, conduct heat and electricity very well 
metalloids (8) elements between metals and nonmetals 
nonmetals do not conduct heat or electricity well, no one characteristic 
groups v...
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CHM 1020 Exam 1 With 100% Correct Answers 2023
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CHM 1020 Exam 1 With 100% Correct Answers 2023 
elements 
one of the 100 pure substances in our world from which compounds are formed 
 
 
 
compound 
pure substance made up of two or more different elements in a fixed, characteristic chemical combination 
 
 
 
mixture 
physical combination of two or more pure substances 
 
 
 
metal 
shiny elements, conduct heat and electricity very well 
 
 
 
metalloids 
(8) elements between metals and nonmetals 
 
 
 
nonmetals 
do not conduct heat or elect...
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CHEM 201 Exam 1 Questions with Answers (Verified)
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how many bonds does carbon have? - 4!!!!!! 
 
What is the geometry of a carbon with four single bonds? - Tetrahedryl 
 
What are the angles of a carbon with single bonds? - 109.5 
 
Which compounds are saturated? - Alkanes (single bonded carbons) are saturated. 
 
Which compounds are unsaturated? - Alkenes (double bonds) and alkynes (triple bonds) 
 
How do you name an alkane? - determine the longest continuous chain of carbons, box it. we call this the parent chain. then you n...
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CHEM133 Week 7 Midterm Exam (Spring)
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1.	Question: Dry ice (carbon dioxide) changes from a solid to a gas at –78.5°C. What is this temperature in °F? 
2.	Question: The state of matter for an object that has both definite volume and definite shape is 
3.	Question: In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers? 
4.	Question: A piece of antimony with a mass of 17.41 g is submerged in 46.3 cm3 of water in a graduated cylinder. The water level increases t...
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CHM 1020 exam 1 questions and verified correct answers 2023
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elements - correct answer one of the 100 pure substances in our world from which compounds are formed 
 
compound - correct answer pure substance made up of two or more different elements in a fixed, characteristic chemical combination 
 
mixture - correct answer physical combination of two or more pure substances 
 
metal - correct answer shiny elements, conduct heat and electricity very well 
 
metalloids - correct answer (8) elements between metals and nonmetals 
 
nonmetals - correct answer ...
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CHEM133 Week 7 Midterm Exam (March)
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1.	Question: Suppose a house has a floor area of 2,250 square feet. What is this area in units of square centimeters? 
2.	Question: A piece of antimony with a mass of 17.41 g is submerged in 46.3 cm3 of water in a graduated cylinder. The water level increases to 48.9 cm3. The correct value for the density of antimony from these data is: 
3.	Question: Liquid nitrogen boils at –195.8°C. Express the boiling point of liquid nitrogen in kelvin. 
4.	Question: What is the volume, in cubic centimeter...
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