Q1)a) Give the chemical formula for this compound. C5H9N3 b) Circle the amine functional groups in histamine NH2, N and HN c) Which part (or parts) of the molecule make the compound water soluble. The “salt” end. 2) a) Give the chemical formula for this compound C16H21N3 b) What similarities do you see between this structure… Read more →
Category: My Work
Polymers!
Introduction Our group will be focusing on Polymers as our chosen topic. A polymer is a large molecule or a macromolecule formed by joining many repeated subunits. They may be naturally found in plants and animals known as the natural polymers or may be man-made called the synthetic polymers. Different polymers have a number of unique physical and chemical properties… Read more →
The World of Polymers and Plastics – Unit 8
Acetone dissolves the polymer, allowing the gas of the foaming agent to escape. The polymer collapses on itself and is more dense because the gas has been removed. LDPE cannot be used in this application because it does not have the required strength. The molecules of HDPE must line up in a way that produces the required strength. Using a… Read more →
Neutralising the Threat of Acid Rain (Session 6: Unit 6)
1.Mammoth Cave National Park in Kentucky is in close proximity to the coal-fired electric utility plants in the Ohio Valley. Noting this, the National Parks Conservation Association (NPCA) reported that this national park had the poorest visibility of any in the country. a) What is the connection between coal-fired plants and poor visibility? Coal-fired plants release sulfur dioxide, creating sulfate… Read more →
Water For Life (session 5 unit 5)
How can you purify your water when you are hiking? Name two or three possibilities.Compare these methods in terms of cost and effectiveness. Are any of these methods similar to those used to purify municipal water supplies? Explain. One of the method used is purification with iodine, however people with thyroid issues and expecting ladies should not use this method… Read more →
Global climate change
Understanding Earth’s energy balance is essential to understanding the issue of global warming. For example, the solar energy striking Earth’s surface averages 168 watts per square metre (W/m2), but the energy leaving Earth’s surface averages 390 (W/m2). Why isn’t Earth cooling rapidly? The emitted heat energy is mainly retained by the atmosphere thus the Earth does not cool rapidly even though the… Read more →
Energy from Combustion!
Question 1 A. A charcoal briquette burns Exothermic. As it burns, heat is released. B. Water evaporates from your skin Endothermic. For evaporation to occur, water absorbs the necessary heat from the surroundings C. Ice melts Endothermic. Melting occurs when ice absorbs heat from the environment Question 2 Q: Chemical explosions are very exothermic reactions. Describe the relative bond strengths in… Read more →