The Water Treatment Process
Water treatment plants convert the raw untreated water to consumable water that is available at your home. The stages of water treatment: 1. Sedimentation: Large particles are screened out ...
Notes by Daniel Paul
Notes, resources, and study guides.
Hardness in Water
Hard water is any water that forms a scum with soap. Soft water forms lather with soap. Hardness is caused by dissolved calcium and magnesium icons (Ca2+ and Mg2+).Temporary hardness - Tem...
The Atom
Matter is composed of very small particles which may be atoms, molecules or ions. The History of the Atom The Greek philosophers first proposed that there were indivisible particles which t...
Organic Chemistry – Summary
General Definitions - Organic Chemistry is the study of compounds of Carbon. - Hydrocarbons are carbons consisting of carbon and hydrogen only, bonded together covalently. They are used as ...
What is the shape of a molecule?
A molecule is nearly all empty space, apart from the extremely dense nuclei of its atoms and the clouds of electrons that bond them together. When that molecule forms, it arranges itself to ...
How small is an atom?
Just how small are atoms? And what’s inside them? The answers turn out to be astounding, even for those who think they know. This fast-paced animation uses spectacular metaphors (imagine a b...
Chemistry Terms- Leaving Cert Higher Level Chemistry
http://quizlet.com/40123528 1. Heat of Combustion – The heat produced when one mole of a substance is completely burnt in excess oxygen. 2. Heat of Formation – The heat change when one mole...
Spanish: The Weather (El Tiempo) – Vocabulary and Expressions
Weather - El Tiempo – The Weather - El Clima – The Climate - Hace frío – It’s cold - Hace calor – It’s hot - Hace sol – It’s sunny - Hace viento – It’s windy - Está lloviendo – It’s raining...
Spanish oral exam: List of possible questions & sample answers
Introductory questions - Hola, ¿Qué tal? / Hola, ¿Cómo estás? – Hello, How are you? - Estoy bien. – I’m fine. - ¿Estás nervioso / preocupado? – Are you nervous / worried? - Sí, un poco. – Y...
La Corrida (The Bullring): Spanish role-play #1
You’re in Alicante, on an exchange. Your Spanish friend’s family invites you to see a bullfight during the San Juan fiestas. – Estás de intercambio en Alicante. La familia de tu amigo/a espa...