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A student is given an antacid tablet that weighed 5.6832g. How much stomach acid was neutralized by the 4.3628 g tablet?
The solution of iodine was standardized with ascorbic acid. A 0.1150g sample of ascorbic acid required 28.37 mL or I2 to reach a starch end point. Calculate the molarity of the iodine solution.
Predict the predominant alkene product that would form when 2-bromo-2-methylpentane is treated with sodium methoxide in methanol. If the base were changed to KOC(CH2CH3)3 would the same alkene pred
Calculate the volume of 3M aqueous sodium hydroxide needed to neutralize the acetic and phosphoric acids in the synthesis of acetyl-ferrocene.
The equilibrium constant for the reaction is 4.2 x 10 -2 calculate the reaction coefficient and determine in which direction the reaction is moving.
A solution containing 9.80g of barium chloride is mixed with a solution containing 5.10g of sodium sulfate. a)What reactant is in excess? b)Determine the excess reactant. c)Predict the mass of the p
If the total pres- sure is 780 torr, the CO has a partial pressure of 330 torr and the CO2 has a partial pressure of 330 torr, what is the partial pressure of O2?
A buffer consists of 0.22 M Na2HPO4 and 0.2 M Na3PO4. Given that the K values for H3PO4 are, Ka1 = 7.2 x 10-3, Ka2 = 6.3 x 10-8, and Ka3 = 4.2 x 10-13, calculate the pH for this buffer.
What volume in mL will a sample of F2 occupy in a syringe at 5.5 atm , if the F2 has a volume of 25.0 mL at 1.2 atm?
Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
50.0 g of KCl at 27.0 °C is dissolved in 100. mL of 27.0 °C water in a coffee cup calorimeter. What is the final temperature of the salt solution? Assume that the heat capacity of the
Ethanol, is added to gasoline to produce E85, a fuel for automobiles engines. How many grams of O2 are required for complete combustion of 421g of ethanol ? When C2H5OH +3O2 produces 2CO2 + 3H2O.
A student titrates 50 mL of apple juice and reports the following in the titration to the phenolphthalein end? What is the concentration of the total available acide in moles/L of the apple juice?
Calculate the mass percent of a NaCl solution in which 176g of NaCl is dissolved in 3.35L of water at 25 °C (density = 0.997 g/mL).
However, when the flask cools some of the vapor condenses in the flask. As a result of this observation, will the reported molar mass of the liquid be too high, too low, or unaffected?
The rxn 2NO + O2 --> 2NO2 is believed to occur by the mechanism. Under what conditions does the rate equation reduce to second-order kinetics in NO and first kinetics in O2?
How much heat would be required to convert 35.0g of ammonia (23.4KJ/mol) from the liquid to the gas phase?
at these currents. The weight of this battery is 460 g. (a) Calculate the power, specific power, and specific energy of this battery in watts, watts per kilogram, and watt hours per kilogram at 5, 4
Write the net ionic equation for this neutralization reaction, including the states of matter for the reactants and products.
If Brand A, has a cost per tablet of 3.29cents/tablet and one tablet neutralizes 0.0128 mole of acid. What is the cost effectiveness of Brand A?
You determine the temperature of the mixed portions of water to be 45 oC. What is the heat capacity of the calorimeter?
acetylene can be made by reacting calcium carbide with water what's the maximum amount of heat that can be obtained from the combustion of acetylene starting with 74.6 g of CaCo2
A physiological saline solution contains 161 mEq/L each of Na+and Cl- , How many moles each of Na+ and Cl- are in 0.700 of the saline solution?
the pump driving the water feature is located 175 ft away (laterally) and is to be installed in a pit 15 ft deep (below grade) what must the pressure be at the pump discharge.
The flask was then shaken until the solution was uniform. A 50.0 rm mL sample of this glucose solution was diluted to 0.500 rm L. How many grams of glucose are in 100. rm mL of the final solution?