Melting point - Study guides, Class notes & Summaries
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CWB Welding Inspector Level 3 Exam Prep (Latest 2023/ 2024 Update) Questions and Verified Answers| All Modules Covered| 100% Correct| Grade A
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CWB Welding Inspector Level 3 Exam Prep (Latest 2023/ 2024 Update) Questions and Verified Answers| All Modules Covered| 100% Correct| Grade A 
 
 
Q: Fluxes that can dissolve the oxides on Al are ............ 
 
 
Answer: 
Halide compounds ( Fluorine, chlorine, Bromine etc.) 
 
 
 
Q: Chlorine gas from a Chloride flux in presence of an arc can create poisonous gas called .......... 
 
 
Answer: 
Phosgene (COCL2) or Mustard gas produced by the reaction of chlorine and carbon monoxide in the prese...
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2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/1F Chemistry Paper 1F Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]
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2023 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/1F Chemistry 
Paper 1F Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] 
Materials 
For this paper you must have: 
• a ruler 
• a scientific calculator 
• the periodic table (enclosed). 
Instructions 
• Use black ink or black ball-point pen. 
• Pencil should only be used for drawing. 
• Fill in the boxes at the top of this page. 
• Answer all questions in the spaces provided. 
• If you need extra space for your answer(s), ...
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CWB Welding Inspector Level 3 Exam Prep (Latest 2024 / 2025 Update) Questions and Verified Answers | All Modules Covered | 100% Correct | Grade A
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CWB Welding Inspector Level 3 Exam Prep (Latest 2024 / 2025 Update) Questions and Verified Answers | All Modules Covered | 100% Correct | Grade A Q: Fluxes that can dissolve the oxides on Al are ............ Answer: Halide compounds ( Fluorine, chlorine, Bromine etc.) Q: Chlorine gas from a Chloride flux in presence of an arc can create poisonous gas called .......... Answer: Phosgene (COCL2) or Mustard gas produced by the reaction of chlorine and carbon monoxide in the presence of intense light...
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CHEM 103 Lab Exam 8 Questions and Answers | Latest Update 2023/2024 (Portage Learning)
- Exam (elaborations) • 8 pages • 2023
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The unit “m” stands for _______ in this experiment. 
2. (4 points) Why was warming data used for estimating the freezing/melting 
point of the cyclohexane? 
3. (3 points) How much of the cyclohexane solvent was placed in the test? 
1.) molarity 
2.) It is considered reliable. 
It is a dependable predicator of the freezing/melting point of a substnace. 
it can determine the temperatures when the change occurs. 
3.) 10 mL of cyclohexane 
1. molality 
2. Solids tend to supercool, which gives fa...
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AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/1H Higher Tier Chemistry Paper 1H Question Paper + Mark scheme [MERGED] June 2022 *jun228464c1H01* IB/M/Jun22/E10 8464/C/1H For Examiner’s Use Question Mark 1
- Exam (elaborations) • 51 pages • 2023
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AQA 
GCSE 
COMBINED SCIENCE: TRILOGY 
8464/C/1H 
Higher Tier 
Chemistry Paper 1H 
Question Paper + Mark scheme [MERGED] 
June 2022 
*junc1H01* 
IB/M/Jun22/E10 8464/C/1H 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
TOTAL 
Time allowed: 1 hour 15 minutes 
Materials 
For this paper you must have: 
• a ruler 
• a scientific calculator 
• the periodic table (enclosed). 
Instructions 
• Use black ink or black ball-point pen. 
• Pencil should only be used for drawing. 
• Fill ...
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FDNY S-92 exam 2023/2024 with 100% correct answers
- Exam (elaborations) • 11 pages • 2023
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The following are types of what? LPG, CNG, piped natural gas or solid fuel (coke). - correct answer Portable fueled salamanders/space heaters 
 
National Institute for Occupational Safety and Health (NIOSH) Recommended 
Exposure Limit (REL) for carbon monoxide - correct answer 35 parts per million (ppm) over an 8 hour period 
 
What is the third leading cause of fires in buildings under 
construction ? - correct answer temporary heating 
 
What is direct heat flow through matter? - correc...
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OCR AS LEVEL CHEMISTRY A HO32/02 DEPTH IN CHEMISTRY ORIGINAL EXAM V2 2024 WITH ACCURATE QUESTIONS AND ANSWERS FOR A+ GRADE CHECK THE LAST PAGE FOR ANSWERS
- Exam (elaborations) • 38 pages • 2023
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OCR AS LEVEL CHEMISTRY A HO32/02 DEPTH IN CHEMISTRY 
ORIGINAL EXAM 2024 WITH ACCURATE QUESTIONS AND ANSWERS FOR A+ GRADE 
CHECK THE LAST PAGE FOR ANSWERS 
1	Group 2 elements are metals that react with oxygen and water. 
 
(a)	Magnesium is oxidised when it burns in oxygen to form an ionic compound. 
 
(i)	Write the electron configuration, in terms of sub-shells, of a magnesium atom. 
 
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OCR A LEVEL CHEMISTRY B (SALTERS) H433/01 FUNDAMENTALS OF CHEMISTRY 2024 ACTUAL EXAM WITH 100% CORRECT ANSWERS. CHECK THE LAST PAGE FOR ANSWERS.
- Exam (elaborations) • 53 pages • 2023
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OCR A LEVEL CHEMISTRY B (SALTERS) H433/01 FUNDAMENTALS OF CHEMISTRY 
2024 ACTUAL EXAM WITH 100% CORRECT ANSWERS. 
CHECK THE LAST PAGE FOR ANSWERS. 
1	Which feature of the structure of the atom was deduced from the Geiger and Marsden experiment? 
 
A	Atoms consist of electrons, protons and neutrons. 
 
B	The nucleus is small and dense. 
 
C	Electrons exist in energy levels/shells. 
 
D	Electrons exist in atomic orbitals. 
 
Your answer	[1] 
 
 
2	Which row gives the correct trends for the followi...
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Chemistry Straighterline Q&A
- Exam (elaborations) • 77 pages • 2023
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An endothermic reaction causes the surroundings to: 
A. warm up 
B. become acidic 
C. condense 
D. decrease in temperature 
E. release CO2 - Answer- D 
 
An exothermic reaction causes the surroundings to: 
A. warm up 
B. become acidic 
C. expand 
D. decrease its temperature 
E. release CO2 - Answer- A 
 
Copper metal has a specific heat of 0.385 J/g•oC and has a melting point of 1083oC. 
 calculate the amount of heat required to raise the temperature of 22.8 g of Cu from 20.0oC to 875oC. 
A. 1...
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Straighterline chemistry exam 2023 with 100% correct answers
- Exam (elaborations) • 117 pages • 2023
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An endothermic reaction causes the surroundings to: 
A. warm up 
B. become acidic 
C. condense 
D. decrease in temperature 
E. release CO2 - correct answer -D 
 
An exothermic reaction causes the surroundings to: 
A. warm up 
B. become acidic 
C. expand 
D. decrease its temperature 
E. release CO2 - correct answer -A 
 
Copper metal has a specific heat of 0.385 J/g•oC and has a melting point of 1083oC. 
 calculate the amount of heat required to raise the temperature of 22.8 g of Cu from 20.0oC...
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