you may be at risk? Well‚ you will learn throughout this paper how important it is to be informed about osteoporosis. This medical condition is when your bones become brittle and fragile with thinning and reduction in bone mass‚ due to depletion of calcium and bone protein (MedicineNet). Bone is living tissue that is constantly becoming broken down and replaced. When you have osteoporosis‚ bone brittleness can lead to fractures if you fall‚ bend over or even cough(mayo clinic). This paper will talk
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Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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Investigate the effect of concentration on the rate of a reaction Research question: To what extent does the concentration of hydrochloric acid affect the rate of the following reaction: 2 HCl(aq) + CaCO3(s) → CaCl2(aq) + H2O(l) + CO2(g) Data Collection and Processing: Table1: Different volumes of Co2 gas produced by Different concentrations of HCL acid. Volume of CO2gas formed from 5 different concentrations of HCL acid ±0.5ml 5 different concentrations of HCL acid (Mol) ±0.5ml Time (sec) ±0
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Water purification is the process of removing undesirable chemicals‚ biological contaminants‚ suspended solids and gases from contaminated water. The goal is to produce water fit for a specific purpose. Most water is purified for human consumption (drinking water)‚ but water purification may also be designed for a variety of other purposes‚ including meeting the requirements of medical‚ pharmacological‚ chemical and industrial applications. In general the methods used include physical processes such
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very soluble. C. Ammonium salts: Almost all ammonium salts are soluble. D. Sulfates: The sulfates of most common elements are soluble‚ except those of calcium‚ strontium‚ barium‚ and lead (II) ions. © 2010 Hands On Labs‚ Inc. LabPaq CK-1 103 E. Hydroxides: Most of the hydroxides are insoluble‚ except those of the alkali metals and barium; calcium hydroxide is moderately soluble. F. Halides: The chloride‚ bromide‚ and iodide salts are generally soluble‚ except those of silver‚ lead (II)‚ and mercury
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Bellamar Caves are a National Monument that is located in Matanzas‚ Cuba‚ they are a set of cave with more than 23 kilometers of galleries. By the beauty of its gallery and caves‚ they were declared a National Monument. The galleries and passages of the cave started forming about 300 thousand years ago. According to the studies the caves were originally under the sea‚ part of the bat of Matanzas. While they were under sea level‚ these caves were full of water. The tectonic movements caused the area
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CHEMICAL WEATHERING Chemical weathering is a process of alteration of rocks of the Earth’s crust. is a chemical decomposition process. is brought out by atmospheric gases and moisture. End product has a different chemical composition and poorer physical constitution. The process: Chemical change in the nature of rock takes place in the presence of moisture containing many active gases such as CO2‚ N2‚ H2‚ and O2. Rocks are made up of minerals. All the minerals in a rock are not in
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powder (NaHCO3) better known to chemists as sodium bicarbonate‚ bicarbonate of soda‚ sodium hydrogen carbonate‚ or sodium acid carbonate. It is classified as an acid salt‚ formed by combining an acid (carbonic) and a base (sodium hydroxide)‚ and it reacts with other chemicals as a mild alkali. At temperatures above 300 degrees Fahrenheit (149 degrees Celsius)‚ baking soda decomposes into sodium carbonate (a more stable substance)‚ water‚ and carbon dioxide. Sodium bicarbonate was discovered by two
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Answer Paper for Science and Technology - II - Paper 4 Time: 2.0 Hrs.------------------------------------------------------------------------------------Max. Marks: 40 Note 1). All questions are compulsory. Note 2). All questions carry equal marks. Note 3). Draw neat and labelled diagrams wherever necessary. Important note from mySSC.in - In this ’Answer paper’‚ questions are displayed for your convenience. In actual exam‚ do not write the questions. Only answers are expected in answer paper
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Republic of the Philippines DEPARTMENT OF EDUCATION REGIONAL SCIENCE HIGH SCHOOL FOR REGION I Division of La Union Bangar‚ La union Effectiveness of Snail shell (Nassariusmutabilis) asAdditive in Chalk Making Proponents: FERNAN MACUSI GERALD JAVAR (IV- Europium) ROGELIO C. VALDEZ (Research Adviser) Abstract Table of Contents Title……………………………………………………………………………………….…i Abstract…………………………………………………………………………………......ii
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