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You have to make a solution of NADH, a biochemical cofactor, with concentration 50 g/mL. Not using a scale, you dissolve a small amount of NADH in 1mL water and measure an absorbance at 340nm of 0.874. The molecular weight of NADH is 663.43g ans it's absorbance coefficient is 6220 M^-1 cm^-1. How much of your solution do you have to dilute to obtain the desired concentration not exceeding volume of 1mL?
it the pH of a strong acid solution nearer to O and a strong base to 14 while a weak adis and base are closer to there perspective approach to 7?
A voltaic cell consists of a strip of cadmium metal in a solution of Cd(NO3)2 in one beaker, and in the other beaker a platinum electrode is immersed in a NaCl solution
A fully animated PowerPoint presentation explaining the molecular structure of fats, the difference between saturated and unsaturated fats and why bromine can be used to test for fats and how saturated they are.
You are provided with the instrumental information below, identify the compound it was obtained for, explaining your reasoning.
It takes 1.35 kJ of energy to heat a sample of pure silver from 12.0°C to 15.5°C. Calculate the mass of the sample of silver.
Calculate the energy for the transition of one mole of electrons from N=10 to the N=7 level in a carbon
Calculate the amount of heat required to heat a 3.6 kg gold bar from 25 C to 64 C. Specific heat capacity of gold is 0.128 j/g C.
By how much is the oxidizing power of MnO4-/Mn2 couple decreased if the H concentration is deceased
what is the vapor pressure of the solution at 20 °C? Values at 20 degress celsius
Lyzozyme(The protein) unfolds at a transition temperature of 75.5 degree celsius, the standard enthalpy of transition = 509 kJ/mol. Compute the entropy of unfolding of this protein at the temperature of twenty five degree celsius
how does the structure of an atom determine the atoms emission and absorption spectra.
For the following reactions, identify the type (combination, combustion, decomposition, displacement, methathesis [double-displacement)] neutralization), balance the reaction, and for the redox reactions identify the oxidizing agent and reducing a..
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