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What is the molarity of a 50% (by mass) NaOH? How did you find this value? Using this molarity, show that 13ml of 50% by mass NaOH diluted to 2200ml with distilled water yields a solution that is about 0.1M NaOH.
Why does the color of a precipitate change from the color of the original solution. For example, if copper sulfate is blue, why is it's precipitate white
if the empty cylinder has the mass of 94.2g and the cylinder with water has the mass of 138.7 what is the mass of water
When the external pressure on a balloon is decreased at constant temperature, what happens to the gas inside. A) The collisions become more elastic. B) the gas undergoes no changes.
The reaction caused the temperature of the water to rise from 21.0 to 24.7 ^\circ \rm C. What is the enthalpy of this reaction. Assume that no heat is lost to the surroundings or to the coffee cup itself.
How many milliliters of ammonium sulfate solution having a concentration of 0.411 M are needed to react completely with 61.4 mL of 1.24 M sodium hydroxide solution. The net ionic equation for the reaction is
An unknown material begins to emit electrons from it's surface when exposed to photons with wavelengths shorter than 540 nm. Give the threshold frequency and the work function for this material.
A compound consist of 40.00% carbon, 6.71% hydrogen and 53.29% oxygen and has a molecular mass of 180+- 1g/mole. Determine the empirical and molecular formulas of the compound.
Complete the following reactions and state the dominant mechanism where indicated 3-chloro - 2,2-dimethylbutane + NH3
Calculate the concentration of all the species, ions, and molecules, and the pH of the following solutions. All solutions have a total volume
Water in a glass tube that contains grease or oil residue displays a flat meniscus, whereas water in a clean glass tube displays a concave meniscus. Explain your answer fully.
Determine what concentration of OH - is needed to dissolve 0.015 mol of Zn(OH) 2 zinc hydroxide in a liter of solution
An unknown compound having the molecular formula C3H6O was tested in the laboratory. It was found to be soluble in water; it showed a negative reaction when it was tested with a chromic acid solution.
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