Chemical and Physical Changes in Matter Purpose: The purpose is to observe chemical and physical changes and to identify each. Procedure: Do experiments 1-8 as directed by the handout. Data and Results: Experiment | Observations | Type of Change | Supporting Evidence | 1 | -After a few seconds‚ yellow smoke was produced-Wood splinters are becoming black-Bottom part of test tube has black color on the sides-Some woods splinters have been burned to ash-Middle of test tube has yellow
Premium Chemistry Chemical reaction Chemical element
Chromium-58 Chromium-63 # of protons # of neutrons # of electrons # of protons # of neutrons # of electrons Carbon-12 Carbon-16 Nitrogen-15 # of protons # of neutrons # of electrons Nitrogen-20 # of protons # of neutrons # of electrons Sulfur-23 Sulfur-25 Fill in the isotope names and any missing information‚ including isotope numbers from the chart. Use your periodic table and the information provided. Iodine# of protons # of neutrons 32 # of electrons 35 # of electrons Iodine# of protons
Premium Atom Atomic number Chemical element
Background: In this investigation you will analyse the composition of a lawn fertiliser‚ or ‘lawn food’. You may use external sources to help you complete the this section. Q1. Why is each of the elements Nitrogen‚ Phosphorus‚ sulfur and iron included in lawn food? ___________________________________________________________________________________________________________________________________________________________________________________________________________________
Premium Titration Hydrochloric acid Potassium permanganate
will strip the waxy coating from trees. Acid rain is formed when sulfur and nitrogen oxide remain in the atmosphere and are absorbed by the raindrops. Acid rain contains carbonic acid‚ which reacts with chemicals present in rocks. “Rocks are needed to maintain the balance on land‚ and they are an integral part of the composition of nature on land (treehuggerusa.com)”. In 2000‚ the EPA’s data showed that Ohio’s emissions of sulfur dioxide and nitrogen oxides were four times greater than New York’s
Premium Sedimentary rock Rock Igneous rock
pollutants that are at greater risk to our environment‚ which are the following: particulate matter (made up of acids‚ organic chemicals‚ metals‚ soils‚ and dust particles)‚ nitrogen oxides (made by highly reactive gasses that contain nitrogen and oxygen)‚ sulfur oxides (dissolves in water vapor to form acid and reacts with other particles and gasses in the air and forms sulfates)‚ carbon dioxides (form carbon monoxide and carbon dioxide)‚ hydrocarbons (consists of hydrogen and carbon)‚ ozone (consists of
Premium Air pollution Global warming Acid rain
surface mines to be reclaimed * Surface Mining Control and Reclamation Act of 1977 Environmental Impacts of Burning Coal: * Increases co2 concentration in atmosphere * Releases mercury into the atmosphere * Lower quality coals release sulfur and nitrogen dioxides‚ causing acid deposition * NOx and SOx Air Pollution * Various chemicals added to the atmosphere by natural events or human activities in high enough concentrations to be harmful. * Primary air pollutions: are harmful
Premium Coal
selenium dioxide. It is similar to hydrogen sulfide‚ a gas that smells like rotten eggs. It is a strong reducing agent. It can be used to add selenide ion to organic compounds. It can also be used to make selenium by reacting it with sulfur dioxide. This makes selenium‚ sulfur‚ and water
Premium Oxygen Water Hydrogen
Hypothesis‚ the Iron-Sulfur World Hypothesis states that the first cells that existed on Earth were enclosed in metals. The lipid present in the cells allowed them to escape. This theory was discovered by Gunter Wachtershauser in 1992. There were no experiments to support it. However‚ bacteria
Premium Life Chemistry Oxygen
do they mean? •Explain the processes of photosynthesis and respiration. •What qualities make water so unique and essential for life as we know it? •Why are big‚ fierce animals rare? •How and why do elements such as carbon‚ nitrogen‚ phosphate‚ and sulfur cycle through ecosystems? 2-2 © 2014 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any manner. This document may not be copied‚ scanned‚ duplicated‚ forwarded
Premium Oxygen Carbon dioxide Photosynthesis
Global Warming Have you ever wondered what it would be like to go a whole winter without even seeing snow? Well the way the atmosphere is heating up today you just might experience this kind of event in the future I chose to do my cause and effect paper on global warming because I believe it has a major impact on humans‚ not only today‚ but especially in the future. In this paper I am going to explain the causes and the effects of global warming and how it will impact our lives in the long
Premium Global warming Carbon dioxide Oxygen