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Question- You ground your vitamin C tablet and dissolved it in 250.mL of water in a volumetric flask. You used a 25.0mL aliquot of this solution for your titration. If it takes 9.40 milliliters of your 0.0151M titrant how many milligrams of ascorbic acid (MW 176.12) were in the original tablet? Enter the number as a decimal - don't use scientific notation. Do not include units.
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Question- Calculate the freezing and boiling points of 250cm3 of water at P=1 atm sweetened by 7.5g of sucrose.
4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 How many moles of O2 will be produced if 5.17 moles of CO2 react completely?
What is the density of the air in the hot-air balloon and is it less dense or more dense with the density of air at STP
When the cations Na+, K+, Rb+, Cs+ are combined with chloride ion in the gas phase to form ion pairs, which pair formation releases the greatest amount of energy?
a calculate the molarity of a solution made by dissolving 12.5 grams of na2cro4 in enough water to form exactly 550 ml
When relatively small amounts of magnesium burns, the fires are extinguished using commercially available dry powder. Why might this fire rekindle days later as someone tries to remove the residue with water?
Write the lewis structure for SeF6. What is the general "ABX" structure, shape name, and molecular polarity?
How many moles of nitrate ions are present in a sample that contains 4.82 moles of chromium(III) nitrate, Cr(NO3)3
An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the temperature was 295 K, and the volume of hydrogen gas collected was 35.6 mL. The calculated value of R was 82.1mL atm K-1..
When cyclohexane (C6H12) is burned in excess oxygen to produce carbon dioxide gas and liquid water, it releases 3919kJ of heat per mole of cyclohexane burned.
Identify the following compound from its IR and proton NMR spectra. C6H10O: NMR: ? 3.31 (3H, s); ? 2.41 (1H, s); ? 1.43 (6H, s) IR: 2110, 3300 cm-1 (sharp)
A 72.0 mL volume of 0.25 Moles HBr is titrated with 0.50 Moles KOH. Calculate the pH after addition of 36.0 mL of KOH
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