Chemistry, 24.09.2019 21:00 kasier4600
Internal energy change (note: you will need appendix a6 for this problem). a. how much energy in joules) must be added to 90 gallons of water at 25 °c and 1 atmosphere (1.0133 bar) to raise its temperature to 94°c? b. how much energy should be added to 90 gallons of 25 °c water at 0.51 bar to raise its temperature to 94°c? c. how much energy should be added to 90 gallons of 25°c water at 21.83 bar to raise its temperature to 94°c? d. how much energy should be added to the same mass of water at 25 °c and 0.0099 bar to raise its temperature to 94 °c? note: you'll need density values. these can be found in the steam tables (appendix a.6) under the column specific volume (m/kg). v is the specific volume of liquid water, v, for water vapor. the value of vis multiplied by 10%, meaning that the specific volume of water at 273.15 k is 1.000 * 10 mº/kg. density is the inverse of specific volume.
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Chemistry, 21.06.2019 23:00
Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?
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Chemistry, 22.06.2019 09:30
Which formula can be used to calculate the molar mass of hydrogen peroxide
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Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
Internal energy change (note: you will need appendix a6 for this problem). a. how much energy in jo...
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