Water vapour - Study guides, Class notes & Summaries

AQA A-level CHEMISTRY (7405/3) Paper 3 Mark scheme June 2023 | VERIFIED. catalyst ALLOW reduces Ea IGNORE speeds up reaction IGNORE provides alternative path IGNORE proton donor IGNORE dehydrating agent 1 Question Answers Additional comments/Guidelines Mark 1.2 electric heater/heat mantle or (hot) water bath IGNORE not with a Bunsen/naked flame / gently ALLOW hot water ALLOW heating/hot plate/ sand bath / oil bath ALLOW reference to flame/Bunsen if in context of heating a water bath ...

All IB Biology Processes Latest Update with Verified Solutions Stem Cell Therapy 1. triggering the differentiation of stem cells into desired cell type 2. surgical implantation of differentiated cells into patients tissue 3. suppression of immune system so they do not get destroyed 4. monitoring so they are not cancerous eg. Stagardt's Disease (old retina cells --> new retina cells) Leukemia (bone marrow transplant) Somatic cell nuclear transfer - creation of embryonic clones...

AQA A-level CHEMISTRY (7405/3) Paper 3 Mark scheme June 2023. catalyst ALLOW reduces Ea IGNORE speeds up reaction IGNORE provides alternative path IGNORE proton donor IGNORE dehydrating agent 1 Question Answers Additional comments/Guidelines Mark 1.2 electric heater/heat mantle or (hot) water bath IGNORE not with a Bunsen/naked flame / gently ALLOW hot water ALLOW heating/hot plate/ sand bath / oil bath ALLOW reference to flame/Bunsen if in context of heating a water bath NOT any ind...

AQA A-level CHEMISTRY (7405/3) Paper 3 Mark scheme June 2023 | VERIFIED. there is a bung/stopper (in the end of the condenser) M2 idea of pressure build up M3 water goes the wrong way through the condenser M4 water does not fill the condenser / condenser is not cool enough owtte M2 stopper could be forced out IGNORE glass shatters / explodes water in at top / out at bottom IGNORE condenser is wrong way round ALLOW less condensing / vapour/gas/reactants/products will not condense / no...

Potable water  Any two from: Distillation  Water evaporated/boiled  (Water vapour) then condensed  OR Any two from: Membrane filtration  Salty water forced through membrane at high pressure  Water molecules pass but dissolved salts don’t  To kill micro-organisms/bacteria  Toxic / poisonous 

I Biological and non-biological substances both need oxygen for their existence. II The human body consists only of biological substances. I is correct and II is incorrect Characteristics of life include: growth and metabolism Examples of synthetic substances are: plastics and silicones Examples of organic biological substances are: carbohydrates and fats Examples of mineral substances are: paraffins and petroleum Matter is everything that: occupies space and has weight The ...

AQA A-level CHEMISTRY (7405/3) Paper 3 Mark scheme June 2023. catalyst ALLOW reduces Ea IGNORE speeds up reaction IGNORE provides alternative path IGNORE proton donor IGNORE dehydrating agent 1 Question Answers Additional comments/Guidelines Mark 1.2 electric heater/heat mantle or (hot) water bath IGNORE not with a Bunsen/naked flame / gently ALLOW hot water ALLOW heating/hot plate/ sand bath / oil bath ALLOW reference to flame/Bunsen if in context of heating a water bath NOT any ind...

Gas Technician G2 Exam Review (Latest 2024/ 2025) Questions and Verified Answers| 100% Correct| Grade A Q: A regulator is sized for the load it is to serve by: Answer: Checking the appliance rating place and selecting a regulator for that input range. Q: A propane vaporizer shall not raise the pressure in a tank in excess of: Answer: 215 PSIG Q: Which of the following best describes a bellows type meter? Answer: One which uses pressure differential across an...

composition of atomosphere correct answers 78% N2, 21 % O2, trace gases fixed trace gases of the atmosphere correct answers argon, carbon dioxide, neon, helium, hydrogen, and xenon variable trace gases of the atmosphere correct answers water vapour, pollutants troposphere correct answers 0-17 km above Earth's surface, site of weather, organisms, contains most atmospheric water vapor. (temperature decreases with increasing altitude, pressure decreases) stratosphere correct answers 2n...

4th Class Power Engineering Unit A12 Chapter 4: Feed water Systems Already Passed With this system, not electrical power is required to feed make-up water to the boiler: Select one: a. gravity return system b. pump return system c. low flow return system d. high side return system a These are similar to combined feedwater feeder/cut-offs, with the exception that they do not have integral mechanically operated control valves: Select one: a. float control feeders b. float contro...