The chemical reaction of SiCl2→ Si +Cl2 is
A decomposition reaction
<u><em>Explanation</em></u>
- <u>A decomposition reaction</u> is type of chemical reaction which involve breaking down a compound into smaller compounds or individual elements.
- <em>SiCl2→ Si +Cl2 is a decomposition reaction because SICl2 is broken down into Si and Cl2</em>
- Decomposition reaction often involve input of energy in form of heat to break down compounds
"An advertisement for a commercial hand warmer claims that the hand warmer works because a chemical reaction in the hand warmer draws out the body’s own natural heat causing a warming effect"
Explanation:
Hand warmer
- Hand warmers are the pockets which produce heat, that you hold on the hands to warm your fingers.
- Niichi Matoba, the Japanese inventor created the first commercially manufactured hand warmer.
- Two types of hand warmers
A) Crystalline type
B) Air activated
C) Lighter
D) Battery
E) Charcoal
- The chemicals produce heat from oxidizing iron into rust or iron oxide in the pockets. Each packet contains cellulose, iron, vermiculite activated carbon, water and salt. Hand warmer produces heat for 1 to 10 hrs.
- Releases heat in the crystallization process. Exothermic reaction to release heat in the chemical hand warmer. The hand warmer lasts only for 20 minutes to 2 hrs.it Is reusable. Supersaturated solution of sodium acetate in water is the common chemical used in this product.
- These temperature reach up to 163 degrees Fahrenheit.
<span>The molar ratios of NaOH to Al(OH)3 are 3 to 1. Therefore, 2.3 moles of NaOH would produce (1/3)*(2.3) moles of Al(OH)3. </span>
Think of the acronym LEO says GER: losing electrons is oxidation, gaining electrons is reduction.
Chromium is a chemical element with symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard and brittle metal which takes a high polish, resists tarnishing, and has a high melting point.
