a) mass c. color b) density d. boiling point 4) An example of an element is . a) sugar c. water b) soil d. oxygen 5) An example of a heterogeneous mixture is . a) salt c. mud b) nitrogen d. air 6) Which process is a chemical change? a) heating to boiling b) dissolving in alcohol c) burning in air d) slicing into two pieces 7) Water boiling at 100°C is an example of a(n) . a) chemical property c. physical property b) extensive property d. chemical change 8) Every pure chemical compound consists of two or more elements .
Chemistry is very important in health, education, technology and many other fields. The foods we eat to grow and nourish our body and medicines we take to cure illnesses, involve chemistry. Compounds and mixtures are present in various aspects of life. (Compound vs. Mixture) What is a compound?
Lipids- they enter the body as a fat. Fibre- this keeps our body regular and functioning normally. Vitamins- these are organic nutrients the body need in small amounts. Minerals- the body needs adequate amounts of 7 minerals (calcium, phosphorus, potassium, sulphur, sodium, chloride and magnesium) D. Name 5 organs inferior to the clavicles and describe the function of each in only one sentence. (5 marks) 5 organs inferior the clavicles are: Lungs- these help us to breathe but extracting carbon dioxide through the walls of the lungs.
Lipids and carbohydrates allow fuel to be utilised as energy, whilst proteins help maintain cells by growing and repairing them (Rolfes, Pinna & Whitney 2012, p.9). Essential vitamins are those that the body requires but must gain them from food and help release energy from protein, lipids and carbohydrates (Rolfes, Pinna & Whitney 2012, p.10). Whilst minerals are utilised by the body to put structures together such as teeth and bones and water is essential to carrying waste away and for the transportation of minerals (Rolfes, Pinna & Whitney 2012, p.11). However, people require differing amounts of these nutrients throughout their life cycle and are also dependent on gender, age, lactation and pregnancy (National Health and Medical Research Council 2014).
The general form of a synthetic reaction looks like this: A + B AB. Here are 5 examples of synthetic reactions: 1) 2H2 + O2 2H2O (The burning of hydrogen to form water) 2) 2C + O2 C O2 (The burning of carbon to form carbon dioxide) 3) 2CO + O2 2CO2 (The burning of carbon monoxide to form carbon dioxide) 4) CaO + H2O Ca(OH)2 (The reaction of calcium oxide
Stomach Cells Kashena Walton SC: 235 General Biology 1: Human Perspectives Instructor: Jeffery Parker Kaplan University I will be discussing the stomach and describing the cells and how they function. According to (Ireland, 2012) the human body has four major tissue types: muscular, nervous, epithelial, and connective. Tissues working together form organs, such as kidney, stomach, liver and heart. The stomach is a muscular internal organ that lies between the esophagus and the small intestine in the upper abdomen. The stomach is not only our digestive system it absorbs food but, rather is a part of the digestive system and important for churning food into a consistency that is easier to digest for the rest of our intestines( Stomach and role in digestion).
Understanding Food Labels Shari Pigman Sci 241 04/12/2013 Andrew Lachut Understanding Food Labels When it comes to a food label, this is a type of sign that shows what we are eating and what is in our food. A food label contains volumes of servings; of what we eat. Food labels show the nutritional facts, calories, and vitamins of the food we are eating. Each bag, box, or package shows all of the ingredients that is in our food that we are consuming. This is to keep us healthy so we can track our calories and cholesterol intake because when you reach a certain age, you have to watch your Trans-fat intake.
Cheyenne Buchanan BIO 490 Research Paper 4 May 2015 Alkaline Phosphatase: The Role it has in the Body Alkaline Phosphatase (ALP), classically known as ortho-phosphoric acid monoester phosphohydrolase, is an enzyme that is naturally abundant throughout the body. This enzyme is specific to the large role it has in the development and growth of the bones and tissues by: monitoring and removing oxygen, calcium, and phosphorus in the body, along with proliferating the body’s life in a healthy manner under specific environmental conditions. Not only is ALP plentiful and in abundance, but there are many variations of ALP, 11 known forms to be exact. The variation in forms of ALP all depend on where in the body the enzyme is being generated, ergo alkaline phosphatase falls under the classification of an isozyme, an enzyme with an abundance of variation. Its highest levels can be found in the liver, intestines, kidneys, placenta, and bone and the importance of alkaline phosphatase is one that cannot go unstudied and under acknowledged.
Introduction A titration was carried out in this experiment to find the concentration of hydrochloric acid is an unknown solution. The aim of this experiment is to determine the number of moles of sodium hydroxide in hydrochloric acid and then to determine the number of moles of sodium hydroxide present in gastric juices. Titration, or volumetric analysis, is a common laboratory procedure for the analysis of substances and solutions. In a titration, the analyst determines the volume of a solution, called a titrant, that reacts exactly with a known weight or volume of another substance. This reaction is carried out by adding a solution of reactant hydrochloric acid from a burette to a solution of sodium hydroxide until just sufficient of hydrochloric acid has been added to react with all of the sodium hydroxide.
What would you expect to happen if a solution of sodium benzoate was acidified? Write an equation. If a solution of sodium benzoate was acidified, Na in sodium benzoate solution will displaced by the H+ from the acid and thus producing benzoic acid. (C6H5)COO-Na+ + H2O/H+ → (C6H5)COOH + Na+ + OH- 3. Use your answers to Questions 1 and 2 to explain how a water-insoluble organic acid might be freed of non-acidic impurities.