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The substances, NaCl, Na2CO3, MgSO4, and NH4Cl used for test solutions, are all soluble ionic compounds. For each substance indicate the ions present in its respective test solution.
What is the entropy change for freezing 4.25 g of C2H5OH at 158.7 K? H = -4600 J/mol. Answer in units of J/K.
How many grams of ammonium sulfate can be produced in 30 mol of H2SO4 react with excess NH3 according to the equation 2NH3(aq)+H2SO4(aq)-->(NH4)2SO4(aq)?
Calculate the number of moles of solute present in 75.0 g of an aqueous solution that is 1.50 % sucrose (C12H22O11) by mass.
Given the values of ΔH ° rxn , ΔS ° rxn , and T below, determine ΔS univ. ΔH ° rxn = 80kJ , ΔS rxn = 143J/K , T= 299K Express your answer using two significant figures.
What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA-, A2-) at pH 8.44
what would happen if the bottle was labeled salicylic acid from benzene actually contained acetylsalicylic acid
What is the molar solubility of pbcl2 in a solution containing 0.020 M cl-(aq)? the ksp for pbcl2 is 1.6*10^-5
a hydrogen-filled balloon was ignited and 1.50 gram of hydrogen reacted with 12.0 g of oxygen. how many grams of water
Balance the following electrochemical equation for a basic environment. MnO41- + Pb4+ ------> MnO + Pb
Calculate the molar solubility of calcium hydroxide in a solution buffered at pH = 3, pH =7, pH = 9. Ksp value for Ca(OH)2 from the textbook: 4.68*10^-6
1. what mass of naohsnbspmust be added to 300 ml of hcl 0.25 m in order to completely neutralize this acid?2. during a
A sample of sodium reacts completely with 0.142kg of chlorine, forming 234g of sodium chloride. What mass of sodium reacted?
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