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A certain system absorbs 0.100 kJ of heat and has 0.400 kJ of work performed on it. What is the value of ?E for the change? Is the overall change exothermic or endothermic?
Explain the reason why the six atoms that are involved in the peptide bond share a common geometric plane
For alloys of two hypothetical metals A and B. Find out composition of phase boundary (or solubility limit) for both and phases at this temperature.
What would happen to the A450 valure for a sample as test tube#10(is included 1ml of 0.0025M Fe(NO3)3 , 1ml of 0.0025M KSCN, and 5ml of 0.1M HNO3 ) ,if accidentally added 5 drops of disodium hydrogen phospate
Problem- If you purchased 3.81?Ci of sulfur-35, how many disintegrations per second does the sample undergo when it is brand new
What are the types of forces, in addition to london forces, that are overcome in these changes. using structural formulas, make a sketch representing the major type of force in each case.
Calculate the volume of a sample gas at 5.75 atm if it occupies 5.61 L at 2.18 atm. (Assume constant temperature.)
Calculate the pH of a solution resulting from mixing together the following: a) 37ml of HCL 0.1M+33ml of NaOH 0.03M b) 55ml of HNO3 0,7M+88ml of KOH 0.8M c) 170 ml of H2SO4 0,44M_29ml of NaOH 1.2M d)76 liters of HBr 0.01M+2 liters of Mg(OH)2 2.1M.
A sample of the exit air is drawn in to a chamber containing a mirror and cooled slowly, keeping the gauge pressure at 10mm Hg. A mist is observed to form on the mirror at a temperature 40C. Calculate mass of water removed from ..
A sample of an unknown gas effuses in 14.7 min. an equal volume of h2 in the same apparatus under the same conditions effuses in 2.42 min. what is the molar mass of the unknown gas
The solubility of N2 in water at 25 degrees celsius and an N2 pressure of 1 atm is 6.8x10^-4 mol/L. Calculate the concentration of dissolved N2 in water under atmospheric conditions where the partial pressure of N2 is 0.78 atm.
A diet soda contains 0.5% sodium, 0.25% potassium and 0.6% aspartame. Can you please show me how to calculate how many grams of each you would consume by drinking a 100 mL can of soda.
this being in excess of the amount needed to neutralize both hydrogens of the H2C2O4. The excess NaOH required 12.62 mL of 0.1251M HClto reach the equivalence point. What was the weight % of H2C2O4 in the sample.
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