aqueous hydrogen peroxide was mixed with 0.50 g of manganese (IV) oxide. The total volume of oxygen formed was measured every 10 seconds. The results of the experiment are shown in the graph. (i) After how many seconds did the decomposition of hydrogen peroxide finish? (ii) How many moles of oxygen were produced at the end of the decomposition? [At room temperature and pressure one mole of oxygen occupies 24000 cm3.] (iii) Use your answer to (ii) to calculate the concentration‚ in mol/dm3
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produce oxygen I added Hydrogen peroxide to manganese. * Next‚ I added baking soda to vinegar. This caused a quick and energetic reaction! The gas from the reaction I pumped into some Limewater. * Then I mixed Alka Seltzer and water and pumped the gas caused by that reaction into some limewater. Data: Data Table: Experiment Results | Gas | Flame Reaction | Glowing Splint | Limewater reaction | Bromothymol blue reaction | Hydrogen | It enlarged the flame. | | | | Oxygen | It lit
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Plants can produce oxygen as by-product‚ and people can produce carbon dioxide. Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water to make oxygen. Photosynthesis takes place in leaves. The leaves are made up of very small cells. Inside these cells are tiny structures called chloroplasts
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Anatomy of the Respiratory System Nose and Nasal Cavity The nose and nasal cavity form the main external opening for the respiratory system and are the first section of the body’s airway—the respiratory tract through which air moves. The nose is a structure of the face made of cartilage‚ bone‚ muscle‚ and skin that supports and protects the anterior portion of the nasal cavity. The nasal cavity is a hollow space within the nose and skull that is lined with hairs and mucus membrane. The function
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as an energy source. Most forms of photosynthesis release oxygen as a byproduct. the reaction of this process: Chlorophillian pigment 6H2O + 12CO2 + S.E -----------------------> C6H12O6+ 6O2 + 6H2O Easily‚ we can explain the reaction like 6 molecules of water plus‚ 12 molecules of Carbon Dioxide plus Sun energy‚ cross with chlorophillian pigment‚ in the product we have glucose‚ plus oxygen‚ plus water. We can put so briefly the process saying that
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Examples of synthesis reactions: 1. Metal + oxygen → metal oxide EX. 2Mg(s) + O2(g) → 2MgO(s) 2. Nonmetal + oxygen → nonmetallic oxide EX. C(s) + O2(g) → CO2(g) 3. Metal oxide + water → metallic hydroxide EX. MgO(s) + H2O(l) → Mg(OH)2(s) 4. Nonmetallic oxide + water → acid EX. CO2(g) + H2O(l) → ; H2CO3(aq) 5. Metal + nonmetal → salt EX. 2 Na(s) + Cl2(g) → 2NaCl(s) 6. A few nonmetals combine with each other. EX. 2P(s) + 3Cl2(g) →
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Assignment 2 front sheet Unit 11 Learner name Assessor name Adama kanu Dr A Carter Teaching starts on Hand out date Student submission deadline Teacher assessment date 29 September 2014 03 October 2014 24 October 2014 28 October 2014 Qualification Unit number and title BTEC Applied Science level 3 Extended National Diploma – medical profile Unit 11: Physiology of human body systems (10 credits‚ 60 hours) Assignment title 2 Assignment 2/4: Physiology of the Cardiovascular and Respiratory Systems (P3
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(H20) or oxygen (O2) to form silicon dioxide‚SiO2 on the silicon surface. The reaction is represented by following equations: Dry oxidation: Si + O2 → SiO2 Wet oxidation: Si + 2H2O → SiO2 + 2H2 The oxidation process can be implemented through diffusion of either water or an oxygen species through the oxide already formed up which then reacts with the silicon at the Si-SiO2 interface. At high temperature‚ thermal energy makes oxygen molecule
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training the body’s cardiovascular system as it trains the body to recover faster after being in the anaerobic state. The intensity of the training can cause adaptations to the body like capillarisation‚ strengthening of the heart muscles‚ improved oxygen uptake and improved flushing of lactic
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rate of reactivity of the enzyme catalase on hydrogen peroxide while subject to different concentrations of an inhibitor. The hypothesis was that hydrogen peroxide will be broken down by catalase into hydrogen and oxygen‚ where a higher concentration of inhibitor will yield less oxygen‚ resultant of a lower rate of reaction. Crushed potato samples of equal weight were placed in hydrogen peroxide solutions of various temperatures. The results showed that less gas was produced as the concentration
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