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30.0 mL of pure water at 280. K is mixed with 50.0 mL of pure water at 348 K. What is the final temperature of the mixture? Ignore significant figures for this problem.
How many liters of O2 are needed to react completely with 45.0L of H2S at STP? 2H2S(g) + 3O2(g) -> 2SO2(g) +2H20(g)
Determine the number of bonding electrons and the number of nonbonding electrons in the structure of BeF_2 please Enter the number of bonding electrons followed by the number of nonbonding electrons
Heart pacemakers are often powered by lithium-silver chromate "button" batteries. The overall cell reaction is: 2 Li(s) + Ag2CrO4(s) -> Li2CrO4(s) + 2 Ag(s)
Suppose that you obtain 1.0 g of salicylic acid from the hydrolysis of 1.3 mL of methyl salicylate. Calculate your percent yield.
An unknown compound X, is thought to have a carboxyl group with a pka of 2.0 and another ionizable group with a pka between 5 and 8. When 75 ml of 0.1 M NaOH was added to 100 ml of a 0.1 m solution of X at pH 2.0, the pH increased to 6.72.
If 95 0C of heat are added to a pure gold coin with a mass of 20 gm, what is its temperature change? Specific heat capacity of gold is 0.128 .
An environmental chemist obtained a 200 mL sample of lake water believed to be cntaminated with a single monoprotic strong acid.
Write the Bronsted-Lowry chemical equation describing how C2H5NH2 behaves when add to water. Indicate whether C2H5NH2 behaves as an acid or a base
What steps do you think need to be taken to prepare the blood sample so that it will be amenable to this type of analysis?
Determine the ion notation for an atom with 18 electrons and 20 protons
What volume of 0.300 M CaCl2 is needed to prepare 240. mL of a solution which is 0.100 M in chloride ion.
determine volume it would have if it reaches an altitude where the temperature = -33 0C , pressure = 0.65 atm?
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