Melting points - Study guides, Class notes & Summaries

Edexcel iGCSE Chemistry, question and answer with rated solution Experiment for Diffusion? 1) HCl placed at one end of the test tube, ammonia solution at the other. 2) Where they meet, a ring of Ammonium Chloride appears. 3) The diagram shows that the ammonia is closer to the ring, showing that ammonia must have travelled faster, showing it's a lighter gas. Experiment for Dilution? 1) Put a coloured substance in a solvent e.g food colouring in water. 2) Over the time, the colour le...

AAMC FL 5 Questions and Answers 2023 Question 6 Thought process: - Didn't know the structure of flavin, therefore needed to narrow down answer from answer choices: - Knew A was a pyrimidine, cross that out - Had not seen structure of B before - Knew C was ubiquinone (still chose just because ubiquinone was mentioned in the passage (stupid)) - Didn't try and analyze structure of D at the time Correct thought process: - Cross out A bc pyrimidine - Never seen B befor...

change of state from solid -> liquid -> gas ________ energy - requires energy needed to phase change from solid --> liquid --> gas comes from: - the surroundings when phases change from solid --> liquid --> gas, interactions are _______ between molecules - overcome change of state from gas --> liquid --> solid ______ energy - releases what happens to the energy from a phase change from gas --> liquid --> solid? -released to surroundings when phases change fro...

T/F: Compared to amylopectin, amylose is branched and contains alpha-1-6 bonds at its branch points. - False. Compared to amylose, amylopectin is branched and contains alpha-1-6 bonds at its branch points. T/F: Compared to amylopectin, an oligosaccharide is longer and contains less prevalent alpha 1-6 bonds. - False. Compared to amylopectin, an oligosaccharide is shorter and contains more prevalent alpha 1-6 bonds. T/F: Compared to amylopectin, glycogen is more branched, and also has a...

CEM 141 Exam 3 Questions and Answers Already Passed change of state from solid -> liquid -> gas ________ energy requires energy needed to phase change from solid --> liquid --> gas comes from: the surroundings when phases change from solid --> liquid --> gas, interactions are _______ between molecules overcome change of state from gas --> liquid --> solid ______ energy releases what happens to the energy from a phase change from gas --> liquid --> s...

AQA GCSE Chemistry Exam Questions With 100% Correct Answers What is a compound? - answerwhen two or more elements react together What is an atoms? - answerthe smallest part of an element that can still be recognised as that element What is a molecule? - answerwhen atoms join together by chemical bonds What is an ion? - answera charged particle produced by the loss or gain of electrons How do the atoms of elements gain stable electronic structures? - answerjoining together by sharing elec...

AQA GCSE Chemistry Exam Questions With 100% Correct Answers What is a compound? - answerwhen two or more elements react together What is an atoms? - answerthe smallest part of an element that can still be recognised as that element What is a molecule? - answerwhen atoms join together by chemical bonds What is an ion? - answera charged particle produced by the loss or gain of electrons How do the atoms of elements gain stable electronic structures? - answerjoining together by sharing elec...

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...

Unit 8 Knewton Exam Questions With Verified Answers. Which of the following statements are true about organic compounds versus inorganic compounds? Select all that apply: The melting points of organic compounds are usually lower than those of inorganic compounds. The boiling points of organic compounds are usually lower than those of inorganic compounds. The flammability of organic compounds is usually lower than that of inorganic compounds. The bond type of organic compounds is more often ionic...

Part 1 of 2 - 48.0/ 52.0 Points Question 1 of 25 4.0/ 4.0 Points Which type of boundaries involve crust being neither created nor destroyed and shearing motion?  A. divergent boundaries  B. transform boundaries  C. convergent boundaries Feedback:2 Plate Tectonics Question 2 of 25 4.0/ 4.0 Points Continent to continent convergent boundaries are commonly associated with which landforms?  A. broad mountain range, folds  B. volcanic arc, forearc basin  C. oceani...