Answer:
Explanation:
Given data
K1 = 2.57 M-1s-1
T1 = 701 K
K2= ?
T2 = 525 K
Ea = 150 kJ/ mol * 1000 J */ 1 kJ = 150000 J / mol
Formula to calculate the rate constant using the activation energy is as follows
ln[K2/K1] = (Ea/ R )*[(1/T1)-(1/T2)]
where R= 8.314 J per mol. K
lets put the values in the formula and calculate the activation energy
ln [K2/2.57] = 150000 J per mol / 8.314 J per K . mol * [(1/701)-(1/525)]
ln [K2/2.57] = -8.628
K2 / 2.57 = anti ln [-8.628]
K2/2.57 = 0.000179
K2 = 0.000179 *2.57
K2 = 0.00046
Therefore rate constant at 525 K is 4.6*10^-4 L/mol. s
A mineral is a naturally occurring , solid, crystalline substance with a specific chemical composition. Minerals are usually inorganic and are formed by ionic, covalent or metallic bonding. Ionic bonds are the dominant type of bonds in mineral strictures. 90% of all minerals are ionic compounds. Minerals bonded by covalent bonds are strong, for example carbon bonded together to form diamond. Metallic bonds are a type of covalent bonds where the atoms have a strong tendency to lose electrons and pack together as cations.
Answer:
A pure substance consists of a single element or compound. Iron is formed only of iron (Fe) atoms; table salt is formed only by sodium chloride (NaCl) molecules. A mixture, however, is made up of different compounds and/or elements.
Explanation:
Matter is anything that takes up space and has mass. Taking up space means that an object has a measurable volume. Mass indicates how much force is required to move the object. Variations of matter include classical matter and dark matter.
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The type of atom has the strongest attraction for electrons in bond formation Chlorine (Ci) c<span>onsider the location of barium, chlorine, iodine, and strontium on the periodic table.</span>