The United Nations in September 2015 agreed on a new global Agenda to take the world on a sustainable pathway. The 2030 Agenda for Sustainable Development involves 17 sustainable development goals (SDGs) for countries to reach by 2030. The sustainable development goals are started to be implemented from January 2016 in all around the world. Implementationof SDGs needs executed policies ... Read more

New series of Fe(II) complexes and Schiff base amino acids have been designed and synthesized from the bioactive ligands by condensation of 5-bromo-2-hydroxybenzaldehyde and aamino acids (L-alanine (ala), L-phenylalanine (phala), L-aspartic acid (aspa), L-histidine (his) and L-arginine (arg)). Elemental analyses, infrared, ultraviolet–visible spectra, as well as conductivity and magnetic susceptibility measurements are used to elucidate the structure of the newly ... Read more

Base-catalyzed hydrolysis of coumalic acid (COU) in binary aqueous-methanol and aqueous-acetone mixtures has been studied kinetically at a temperature range from 283 to 313 K Moreover, the change in the activation energy barrier of COU from water to water–methanol and water–acetone mixtures is estimated from the kinetic data. Solvent effects on reactivity trends have been analyzed into initial and transition ... Read more

The kinetics of hydroxide ion attack on bis(bromosalicylidene alanate)iron (II) (bsali), bis(bromosalicylidene phenylalanate)iron(II) (bsphali), bis(bromosalicylidene aspartate)iron(II) (bsasi), (bromosalicylidene histidinate)iron(II) (bshi), bis(bromosalicylidene arginate)iron(II) (bsari) have been reported in different binary aqueous solvent mixtures at 298 K. The observed reactivity trends are discussed in terms of the hydrophilic and hydrophobic forms of the complexes investigated, as well as the transfer chemical potentials ... Read more

Rate constants for the base hydrolysis of bis(naphthylidene alanate)iron (II) (nali), bis (naphthylidene phenylalanate)iron(II) (nphali), bis(naphthylidene aspartate)iron(II) (nasi) (naphthylidene histidinate)iron(II) (nhi), bis(naphthylidene arginate)iron(II) (nari) have been reported in different binary aqueous solvent mixtures at 298 K. The observed reactivity trends are discussed in terms of the hydrophilic and hydrophobic forms of the complexes investigated, as well as the transfer chemical ... Read more

Deduce the relation between the reaction rate and substrate concentration for an enzym "HE" in both acidic and basic medium. Concerning the following: Kb=[H+][HE]/[H2E+] Ka=[H+][E-]/[HE] 0[E] = [HE] + [HES] + [H2E+] + [E-] Read more

If 1.000 mol of an ideal gas were confined to 22.41 L at 0.0°C, it would exert a pressure of 1.000 atm. Use the van der Waals equation to estimate the pressure exerted by 1.000 mol of Cl2(_g_) in 22.41 L at 0.0°C (a = 6.49 L2-atm/mol2, b = 0.0562 , R = 0.08206 L-atm/mol-K). Read more

The units of different Rate constants The _order_ of a rate law is the sum of the exponents of its concentration terms. Once the rate law of a reaction has been determined, that same law can be used to understand more fully the composition of the reaction mixture. More specifically, the reaction order is the exponent to which the concentration ... Read more

The RATE LAW or RATE EQUATION for a chemical reaction is an equation that links the reaction rate with the concentrations or pressures of the reactants and constant parameters (normally rate coefficients and partial reaction orders). A first order reaction depends on the concentration of only one reactant (a unimolecular reaction) IN 1ST ORDER REACTION:IN 1ST ORDER REACTION:IN 1ST ORDER ... Read more

[1] A tank used for filling helium balloons has a volume of 0.300 m3 and contains 2.00 mol of helium gas at 20.0°C. Assume that the helium behaves like an ideal gas. (A) What is the total translational kinetic energy of the gas molecules? (B) What is the average kinetic energy per molecule? [2] What if the temperature is raised ... Read more