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Problem- At what angle (in degrees) must {111} planes of platinum (Pt) be exposed to a collimated beam of thee X-rays in order to obtain by diffraction monochromatic CrKα radiation.
Rewrite your answer from the stating and prove each step carefully.
A fossil was analyzed and determined to have a carbon-14 level that is 42.0 that of living organisms. How old is the fossil
Question- 1) What is the X-Se-X bond angle, here X represents the outer atoms in each of the following molecules
Make the following assumptions in your calculation; at normal filling conditions, the densities of engine coolant and water are 1.11 g/mL and 0.998 g/mL respectively. Assume that the engine coolant is pure ethylene glycol (HOCH2CH2OH), which is no..
Problem- In what form(s) will a carboxylic acid, RCOOH, be present if the pH of an aqueous solution is adjusted to be the same as the pKa of the acid
How much heat (in kJ) is needed to convert 866 g of ice at -10 degress celsius to steam at 126 degrees Celsius? (The specific heats of ice and steam are 2.03 and 1.99 J/g x respectively)
a current of 0.500 a is passed through an electrolytic cell containing molten mgcl2 for 2.00 h. calculate the quantity
Concentrated sulfuric acid is used as a catalyst for the esterfication of acetic acid in the preparation of isopentyl acetate. Why is the sulfuric acid needed if another acid,
A solution is made by adding 70.00grams of sodium acetate to 550.0mL of 0.60 mol/L solution of acetic acid. a.What is the pH of the
At a certain temperature and pressure, one liter of CO2 gas weighs 1.95 g. What is the mass of one liter of C2H6 gas at the same temperature and pressure
Initial temp of HCL solution: 22 degree c Mass of magnesium: 0.6 g Moles of mag: 0.025 highest temp of mixture: 63 degree c Delta T: 41 degree c Heat gained by solution
Explain what is the magnitude of the partial positive and partial negative charges in the HBr molecule. (1D=3.36x10-30 C m; 1e = 1.6022x10-19 C; bond length HBr= 1.41 angstroms; Dipole Moment HBr= 0.82D)
If the equilibrium constant for the reaction H2O + CO = CO2 + H2 is 2.5, the equilibrium conversion of CO is lower than 65%
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