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29 grams dry mix 28 grams of sugar a) What is the % by mass of the dry mix that is made up of "sugars"? (use 3 s.f. in all your answers for this problem) b) Malic acid is #2 on the ingredients list, so let\'s assume that 3/4 of the mix that is not \"sugars\" is malic acid. Using this estimate, what is the % by mass of malic acid in the mix? c) If you measured out 5.00 g of dry mix and used the estimated % malic acid calculated in step b, how many moles of malic acid (C4H6O5) would this contain? d) Using the reaction stoichiometry for the chemical reaction of malic acid with NaOH (aq) shown in your lab manual, calculate how many mL of 0.200 M NaOH (aq) would be needed to react with the malic acid sample from step c.
Write the differential form of the energy and entropy representations of the fundamental equation. Identify the new intensive variables and how they relate to partial derivatives of the fundamental relations.
A quality control chemist at Dow Chemical tried to determine purity of NaOH using titration.He measured out 0.500 g NaOH sample, and dissolved it in 20 mL water. 31.2 mL of a 0.386 mol/L HCl solution was used to reach the end point.
In the concentration range of 500 to 2000 ppm of U, there is a linear relationship between absorbance at 351.5 nm and concentration. At lower concentrations the relationship is nonlinear unless about 2000 ppm of an alkali metal salt is introduced ..
The vapor pressure of mercury is .0127 torr at 50 degrees celcius and .0888 torr at 80 degrees celcius. calculate the enthalpy of vaporization of mercury
Thallium and indium form +1 and +3 oxidation states when in compounds. Predict the fomulas of the possible compounds between thallium and oxygen and between indium and chlorine. Name the compounds
3H2 (g) + N2 (g) 2NH3(g), Kc = 6.0 × 10-2 at 500°C for this nitrogen fixation reaction. What is the equilibrium concentration of N2 If 0.250 M H2 and 0.050 M NH3 are present at equilibrium?
Calculate the de Broglie wavelength of a neutron moving at 1.17% of the speed of light. _____m
An equilibrium mixture contains N2O4 , (P= 0.27 ) and NO2 (P= 1.0 ) at 350 K . The volume of the container is doubled at constant temperature.
The complete combustion of 1.076g of C9H8O in a bomb calorimeter ( Cccalorimeter=3.895 kJ/ degree C) produced an increase in temperature of 11.21C. Calculate the molar enthalpy of combustion in kJ/mol.
Describe the basic steps involved in gravimetric analysis. How does this procedure help us determine the identity of a compound or the purity of a compound if its formula is known.
When 15.0 L of water is added to 1.5 liter of a 2.0 M solution of potassium phosphate (aq), what is the final concentration
When M2S3(s) is heated in air, it is converted to MO2(s). A 3.700-g sample of M2S3(s) shows a decrease in mass of 0.207 g when it is heated in air.
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