Which of the following is the most basic oxide? (a) N 2. Which of the following is an ionic hydride? (a) PH 3 (b) H 2 S (c) HI (d) KH (e) CH 4. All of the following properties of the alkaline earth metals increase going down the group except (a) atomic radius (b) first ionization energy (c) ionic radius (d) atomic mass (e) atomic volume 12. An alloy is a homogeneous mixture of two or more metals, or a metal and a non-metal. It is used in sterilising drinking water. It is used in the manufacture of dyes, drugs and many organic compounds like chloroform, DDT, etc. It is used in the manufacture of bleaching powder. Propane: Burned to produce heat and light. Cold packs: Chemical energy is absorbed in a reaction. Food: Digested to convert chemical energy into other forms of energy used by cells. Extras: Natural gas: Combustion reaction converts chemical energy into light and heat. ĭana safety supply near rangpur livestock whatsapp group Biomass: Combustion reaction converts chemical energy into light and heat. Its chemical activity can be attributed to its extreme ability to attract electrons (it is the most electronegative element) and to the small size of its atoms. fluorine (F), most reactive chemical element and the lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. As well, it mathematically expresses the relationships we established earlier: as activation energy term E a increases, the rate constant k decreases and therefore the rate of reaction decreases. The Arrhenius equation allows us to calculate activation energies if the rate constant is known, or vice versa. In this light, CLEANER chemical engineering is a significant issue as most of the energy today is still being extracted by chemical conversion of fossil fuels, releasing a vast amount of environmentally dangerous and harmful gases. Cleaner Chemical Engineering is a platform to analyze and debate the role of chemical engineering in the period of the energy transition.
The formation of rust is a chemical change because rust is a different kind of matter than the iron, oxygen, and water present before the rust formed. A chemical change always produces one or more types of matter that differ from the matter sspresent before the change. To identify a chemical property, we look for a chemical change. Kinetic energy is determined by the movement of an object – or the composite motion of the components of an object – and potential energy reflects the potential of an object to have motion, and generally is a function of the position of an object. The total energy of a system can be subdivided and classified into potential energy, kinetic energy, or combinations of the two in various ways.
Classify the six underlined properties in the following paragraph as chemical or physical: Fluorine is a pale yellow gas that reacts with most substances.The free element melts at −220 ☌ and boils at −188 ☌.Finely divided metals burn in fluorine with a bright flame.Nineteen grams of fluorine will react with 1.0 gram of hydrogen.
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