Crystalline Polymer = a polymer in a solid structure which is ordered.
Amorphous Polymer = a polymer without a clearly defined shape/form
Answer:
The letters are a one- or two-letter symbol assigned to each. element. ... The letters represent the name of the element when it was. discovered
Explanation:
What do the letters in the boxes of the periodic table represent?
A. The letters stand for the names commonly used for the elements.
O
C. The letters are an abbreviation of the element's name in English.
O
n chemistry, a symbol is an abbreviation for a chemical element. Symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalised.
Earlier symbols for chemical elements stem from classical Latin and Greek vocabulary. For some elements, this is because the material was known in ancient times, while for others, the name is a more recent invention. For example, Pb is the symbol for lead (plumbum in Latin); Hg is the symbol for mercury (hydrargyrum in Greek); and He is the symbol for helium (a new Latin name) because helium was not known in ancient Roman times. Some symbols come from other sources, like W for tungsten (Wolfram in German) which was not known in Roman times.d
Answer:
- Blank 1: <u>million of years</u>
- Blank 2: <u>compression</u>
- Blank 3: <u>decomposition</u>
Explanation:
<em>Fossil fuels</em> are mixtures of substances that can be burne to obtain energy like coal, petroleum and natural gas.
They are formed by <em>organic matter,</em> mainly carbon and hydrogen, along with other elements.
The theory with the most consensus on the formation of <em>fossil fuels</em> is that they formed after <em>organic matter</em>, plants and animals, died and were buried under a huge mass of sediments.
The huge pressures, in the absence of oxygen, yield the decomposition of the organic matter to form the fossil fuels.
Due to the fossil fuels require million of years to be formed they are considered nonrenewable energy resources, as they cannot possible be formed in a reasonable time on human life scale.
<span>The balanced reaction that describes the reaction between hydrogen and nitrogen to produce ammonia is expressed 3H2 + N2 = 2NH3. The yield of the reaction is equal to the actual amount of product divided to the theoretical amount of product multiplied by 100 percent. 26.3 grams of H2 theoretically produces149 grams. The yield is 79 divided by 149 equal to 53.02 percent. </span>
