Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
For the following processes, calculate the change in internal energy of the system and determine whether the process is endothermic or exothermic:
(a) A balloon is heated by adding 850 J of heat. It expands, doing 382 J of work on the atmosphere.
(b) A 50-g sample of water is cooled from 30 degrees Celcius to 15 degrees Celcius, thereby losing approximately 3140 J of heat.
(c) A chemical reaction releases 6.47 kJ of heat and does no work on the surroundings
how many liters of fluoridated drinking water would a 70 kg person have to consume in one day to reach this toxic level? How many kg of sodium floride would be needed to treat a 7.49x10^6 -gal reservior?
Atomic orbitals of carbon relative to methane in a cubic frame of reference.
Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.076 moles of sulfuric acid is mixed with water to make 670 mililiter of solution, what is the molarity of H+?
What volume of concentrated HCl is necessary to completely neutralize the 10 mL of 1.5 M NaOH used?
A grad student made the news for all the WRONG reasons a few years ago when he synthesized a "nickel hydrazine perchlorate" compound (but didn't give any more detailed information) on a scale 1000 times larger than what his lab advisor told him to..
acetic anhydride C4H603 to form aspirin C9H8O4 and acetic acid CH3C00H. What mass of acetic anhydride did the student use? What is the limiting reactant?
Describe the preparation of 1L solution of 0.02M Tris buffer, PH 7.8. Please don't just write numbers.. explain it.
Hemoglobin, a nonelctrolyte is an iron containing protein found in red blood cells. The osmotic pressure of 25.0 mL of an aq. soln containing 0.658 g of hemoglobin is 9.88x10^-3 atm at 25.0 *C. Determine the molar mass of hemoglobin
A 0.0490 molal aqueous NaBr solution freezes at -0.173°C. What is its apparent percent dissociation in this solution? Kf = 1.86°C/m for water. NaBr -> Na+ + Br-
A copper refinery produces a copper ingot weighing 180lb . If the copper is drawn into wire whose diameter is 8.10 mm , how many feet of copper can be obtained from the ingot? The density of copper is 8.94g/cm3 .
The 9.163 g their air Air Cs equals 1005J/KG c in an inflated balloon is warmed over a toaster and increases in temperature by 11°C the balloon expands against one atmospheric pressure and changes volume for one liter to two liters
How many grams of caffeine (C8H10N4O2) are present in one cup of coffee that contains 8.98 × 1021 caffeine molecules?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd