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Different manufacturers claim to have the best antacid. Which of the following tablets would neutralize the most acid for the money?
• Rolaids (550 mg CaCO3 and 110 mg Mg(OH)2 per tablet) - 150 tablets for $9.44
• Tums (500 mg CaCO3 per tablet) - 150 tablets for $5.49
• Phillips (1200 mg Mg(OH)2 per 15 mL) - 769 mL for $9.99
Lithium iodide has a lattice energy of and a heat of hydration of. Determine how much heat is evolved or absorbed when 40.0 of lithium iodide completely dissolves in water.
The decomposition of nitramide, O2NNH2, in water has the following chemical equation and rate law. O2NNH2 (aq) yields N2O (g) + H2O (l) rate= [O2NNH2]/[H]
Important information about Molarity, You have 20 ml of 10% Bromophenol Blue (BPB). Using a 10% stock, how would you prepare 5 ml of a 0.2 % stock?
the distance gauge indicates that you have traveled 15.2mi. what was your rate in km/hr?
Calculate the volume and mass required to make 0.1m solutions of your assigned acid (HNO3) and conjugate base
The heats of reaction for the following combustion reactions were determined experimentally
There are four peaks in the H nmr but they do not match the calculated ppm values. Which hydrogens would match the peaks for m-trifluoromethyl benzoic acid
A sample of compact bone has a mass of 5.80 g and a volume of 3.00 cm3. What is the density of the sample?
drinking water was determined in seven replicate measurements with the following results (in ppb): 1.84; 1.92; 1.94; 1.92; 1.85; 1.91; 1.97. What is the standard deviation of these measurements in ppb?
How many grams of .49% wt% aqueous HF are required to provide a 25% excess to react with 25 mL of .023 M Th^4+ by the reaction Th^4+ + 4F^- --> ThF4
The standard molar heat of fusion of ice is 6020 J/mol. Calculate q, w, and E for melting 1.00 mol of ice at 0C and 1.00 atm pressure.
If 27.0 mL of 0.0200 M KMnO4 were required to titrate a 0.425 g sample of K3[Fe(C2O4)3] * 3H2O, what is the % purity of the complex
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