atomic number = 74)? a) 30.0 g FeWO4 b) 304 g FeWO4 c) 82.6 g FeWO4 d) 188 g FeWO4 d) FeSO4 4. A compound contains 20.2% magnesium‚ 39.8% titanium‚ and 40.0% oxygen by mass. What is the empirical formula of this compound? a) MgTiO b) MgTi2O3 c) Mg2TiO4 d) MgTiO3 5. Which of the following DOES NOT contain 4.00 moles of oxygen atoms? a) 2.00 moles of CO2 b) 128.0 g of SO2 c) 0.40 moles of P4O10 d) 4.00 moles of KClO3 6. A compound has an empirical formula of C2HBr. If the molar mass
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determining the formula of the compound that results when Magnesium and Oxygen react. Theory: The purpose of this lab was to confirm the chemical formula of magnesium oxide by comparing the masses of pure magnesium solid prior to any reaction and magnesium oxide solid after a reaction between all of the magnesium and oxygen from the air when heated from a Bunsen burner in a crucible. Using molar masses of both magnesium and oxygen‚ an expected percent composition‚ by mass‚ was found and compared to
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muscles? Background Normally‚ muscles use oxygen through a process known as cellular/aerobic respiration to make energy (or ATP) from sugar (glucose). This process is very efficient and produces 38 ATPs for each molecule of glucose. Carbon dioxide and water are the results of this reaction. When muscles undergo rigorous exercise they require more oxygen to make ATP than the blood can supply. At this point the muscle is forced to produce ATP without oxygen. This is known as anaerobic respiration
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Joseph Priestly is another scientist who discovered photosynthesis when he does the mint in a jar experiment he soon discovered oxygen her are his measurements: Hypothesis: if I put a candle in a jar with a leaf of mint in it then it will burn until it runs out. Independent Variable: The jar doesn’t depend on anything. Dependent Variable: The candle depends on the oxygen to stay lit. Controlled Variable: The air is the controlled.
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is to move fresh air into and get waste gases out of the body. Lungs are very important because Oxygen‚ a basic gas‚ is needed by every cell in your body in order to live. The air that comes into the body through the lungs contains oxygen and other gases. In the lungs‚ the oxygen is moved into the bloodstream and carried through the body. At each cell in the body‚ the oxygen cells are exchanged for waste gas called carbon dioxide. The bloodstream then carries this waste gas back to the
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Name:Mike Tutor: John Title: Recognizing and Acting on Clinical Deterioration Course: Date: Recognizing and Acting on Clinical Deterioration Introduction The purpose of nurses in ensuring that the medication a patient is undergoing gives the best result is very important. The medication that the patient takes works effectively if the nurse can efficiently observe and identify worsening conditions of the patient and take necessary action that efficiently manages
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Abstract The decomposition of hydrogen peroxide (H2O2) in a whole and diced wedges by with The enzyme catalase was observed. The catalase was able to break down the hydrogen peroxide In the diced banana wedge better than the whole banana because after the banana was diced that Increases the surface area allowing the breakdown to flow. The effects of temperature on enzyme In a liver sample were observed under iced‚ boiling‚ 37 degrees‚ and room temperature Conditions. The enzymes became completely
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planet. Most of our atmosphere is located close to the earth’s surface where it is most dense. The air of our planet is 78% nitrogen and just under 21% oxygen; the small amount remaining is composed of carbon dioxide and other gasses.It is a mixture of gases encircling the Earth and held by the Earth’s gravity. This invisible mixture of nitrogen‚ oxygen‚ argon‚ carbon dioxide‚ and water vapor protects the planet from harmful radiation and makes life on it. (Atienza et al.‚ 2012) Atmosphere and Ecology
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temperatures (above 400’C) it decomposes poto tassium chloride and elemental oxygen‚ according to the following equation: 2 KCIOB(s) -----+ 2 KCI(s) + 3 Ork) The relative amounts of oxygen and potassium chloride are measured by heating a weighed sample of potassium chlorate and determining the amount of residue (potassium chloride) remaining. The decrease in mass brought about by heating represents the amount of oxygen originally present in the sample. From the experiment we obtain the following
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Science questions 1) carbon dioxide 2) Living organisms like plants‚ animals and decomposertake oxygen from the atmosphere and utiliseit for respiration. 3) Nitrogen fixation 4) Biosphere is the regions of surface atmosphere occupied by living organisms sustainsble ecosystem ecosystem is one that can survive and thrive without humans having to continually add or take out of the ecosystem. 5) When animals breathe they produce carbon dioxide and you get it when you eat a plant. 6) We use carbin
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