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Calculate the energy neede to cool 1,755.5g of (CH4) from 35 to -180 if the heat of vaporization is 650 J/g the heat of Fusion is 95.7 J/g, the specific heat of methane gas is 0.54 J/g the specific heat of methane liquid is 0.89 J/g and the condensation point of methane is -164
suppose that 1.02 of rubbing alcohol evaporates from a 57.0 aluminum block. if the aluminum block is initially at 25
If 10.0mL of blood plasma has a mass of 10.279g and contains 0.870g of protein, what is the mass/mass percent concentration of the sample?
Consider the following reaction at constant P. Use the information here to determine the value of Ssurr at 298 K. Predict whether or not this reaction
What is the [H+] in the resulting solution when 10.0ml of 0.10M NaOH is mixed with 12.0ml of 0.10M HCl
A voltaic cell consists of a Mn/Mn2+ electrode (E°= -1.18 V) and a Fe/Fe2+ electrode (E°= -0.44 V). Calculate [Fe2+] if [Mn2+] = 0.050 M and Ecell = 0.78 V at 25°C.
element x crystallizes in a body-centered cubic lattice. it satomic mass is 59 amu. the edge length of a unit cell of x
calculate the pressure change needed to completely hydrogenate this substance at room temperature and 50 degrees celcius.
Ozone,O3 , is destroyed when ClO levels are high. ClO is likely formed from the decomposition of chlorofluorocarbons (CFCs) in sunlight. Standard enthalpies of formation for selected substances are given in the table below.
A 20.5 g sample of protein dissolved in water to prepare 500ml solution shows an osmatic pressure of 3.72 torr at 27 degrees C. Estimate the molar mass of the protein
3.60 g of liquid methanol ch3oh is placed in an empty 20.0 l container at 45.0degc. if the volume of the container is
The Freezing point depression of a .100 molal MgSO4 solution is .225Celsius . Determine the experimental Van't hoff factor of MgSO4 concentration. M=π/RT π=iMRT Tf=iKfm Answer is 1.21How do you get this
What is the volume in mL of 0.185 M HCl(aq) needed to reach halfway to the equivalence (stoichiometric) point in the titration of 47.0 mL of 0.196 M N2H4(aq) (Kb = 1.7 x 10^-6).
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