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An acid with a Ka of 1 x 10-8 is titrated with NaOH, both solutions being 0.020 M. What should the Ka of the indicator be, in order to obtain the best end point?
Identify which will be warmer if you heat equal masses of gold and iron starting at room temperature with 1 kJ of energy
A mixture of ammonium chloride and sand is placed in an evaporating dish and massed at 56.246g. The mixture is heated, driving off the ammonium chloride and massed again
Pentan-2-ol reacts with tosylate/nucleophile and the following: Hydroxide, cyanide, bromide, sodium propoxide and ammonia. What are the products from each? Then 2-methylpentan-2-ol reacts with the same substances. What are the products
The total pressure of the container after the water condenses (5C) is .857 atm. What are the partial pressures of the 4 gases at 5C. e)What was the temperature of the container in Kelvin before it was cooled to 5C?
If a 200 piece of gold (density =19.32 ) is hammered into a sheet measuring 2.5 by 1.0 ft , what is the average thickness of the sheet in meters?
Suppose that the microwave radiation has a wavelength of 13.2 cm. How many photons are required to heat 200. mL of coffee from 23°C to 62°C?
Starting with 0.86 moles of HF, calculate the number of moles of H2O that is produced by this balanced reaction.
How many H- ions are around each Na+ ion in NaH, which has a cubic unit cell with H- ions on each corner and each face
Tungsten (W) metal, which is used to make incandescent bulb filaments is produced by the reaction
Hydrogen iodide decomposes according to the equation: 2HI(g) H2(g) + I2(g) Kc = 0.0156 at 400°C. A 0.57 mol sample of HI was injected into a 2.0 L reaction vessel held at 400°C. Calculate the concentration of HI at equilibrium.
The water level in a graduated cylinder initially at 220 rises to 279 after a piece of lead is submerged. What is the mass in grams of the lead.
3AgNO3 + Na3PO4 --> Ag3PO4 + 3NaNO3 Silver nitrate and sodium phosphate are reacted in equal amounts of 200. g each. How many grams of silver phosphate are produced?
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