Chemistry assignment Introduction: Throughout modern day society metals are constantly used‚ in fact mankind has been heavily dependent on metals for the last several hundred years. But the science behind metals has only been discovered in recent years and has now become known to people that we simply could not live without them. Metals make up around 80% of the elements (currently discovered). They are used in everyday items that society depends on‚ such as: cars‚ re-bars for building‚ window
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protective membranes of the nose and throat and interferes with the body’s ability to fight infection‚ increasing susceptibility to illness. Asthma and bronchitis. 2. Formation of acid rains. Sulfur dioxide or nitrogen oxides released‚ combined with oxygen and
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water vapour‚ nitrogen‚ and oxygen. Suggest why oxygen (found as O2 in the air we breathe) is more likely to react rather than nitrogen (N2). The surface of Na and K could be tarnished because of reaction with oxygen. If Na or K is burned in air‚ the results are mainly formation of white sodium peroxide‚ Na2O2 and orange potassium superoxide‚ KO2. 2Na (s) + O2 (g) → Na2O2 (s) K (s) + O2 (g) → KO2 (s) Oxygen‚ O2 is more likely to react than nitrogen‚ N2 because the oxygen molecule has partially-filled
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S + O2 ---------> SO2 sulphur oxygen sulphur dioxide 2 S + 3 O2 ---------> 2 SO3 sulphur oxygen sulphur trioxide 2 Fe + O2 ---------> 2 FeO iron oxygen iron (II) oxide Decomposition
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IGCSE Complete Chemistry Notes Unit 1: States of matter Everything is made of particles. Particles in solid are not free to move around. Liquids and gases can. As particles move they collide with each other and bounce off in all directions. This is called random motion. In 2 substances‚ when mixed‚ particles bounce off in all directions when they collide. This mixing process is called diffusion. It’s also the movement of particles without a force. The smallest particle
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I’m looking at‚ when it comes to respiration in yeast is the change in oxygen levels or rather the amount of Carbon Dioxide in the air before and after process of respiration.
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pressure of C02 in the test tube. The experiment tested the metabolic capability of yeast anaerobically meaning no oxygen was present (this was ensured by the thin layer of oil on the top of the solution). This means that the metabolic rate of the yeast could be determined by testing the pressure in the tube because oxygen gas is consumed at the same rate C02 is released‚ but because oxygen is not present‚ pressure will increase due to the emission of C02. The pressure represents the rate of fermentation
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reactions that take place in the explosions requirethe use of oxidisers‚ reducing agents and binders. The additions ofvarying metal chlorides add the colours. (See Table 1)OxidisersAn oxidizing agent producing the oxygen required to burn the mixtureReducersAn agent e.g. Sulphur‚ that burn the oxygen and produce hot gasesBindersRequired to hold the mixture in a lumpTABLE 1: Oxidisers‚ Reducers and BindersThe ability of producing coloured light from the principles offireworks have allowed this technology
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As a catabolic process‚ it may or may not require the presence of oxygen. The process that requires oxygen is called aerobic respiration while the process that does not require the presence of oxygen is called anaerobic respiration. (Duka‚ et.al. 2007) Despite of its low yield of only two ATP (energy used by the cells to perform its duties)‚ anaerobic respiration is essential because it continuously synthesizes ATP albeit oxygen is temporarily in short supply. Although anaerobic respiration synthesizes
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Kinetic Theory Objectives • Describe how the kinetic-molecular theory is used to explain how gases behave at different temperatures. (Exploration 1) • Analyze data that shows how gas particle mass affects that gas’s behavior. (Exploration 2) • Describe the Maxwell-Boltzmann Distribution. (Explorations 1 and 2) Description of Activity The kinetic-molecular theory states that a collection of gas molecules’ average kinetic energy has a specific value at any given temperature
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