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!
A water chemist obtained a 250-mL sample from a nearby lake and fixed the oxygen on-site wth alkaline solutions of MnS04 and Kl-NaN3-. returning to the labrotary, a 200-mL sample was analyzed by acidifying the sample with conc H2SO4 and then titrating with 14.4 mL of 0.0213 M Na2S2O3 solution to the starch endpoint.
a) calculate the number of moles of I3- that reacted with the Na2S2O3 solution.
b) calculate the number of moles of Mn(OH)3 that were produced from the reduction of the dissolved oxygen.
c) calculate the number of moles and milligrams of O2 present in the titrated sample.
d) what is the dissolved oxygen concentration in the sample, expressed in ppm O2?
glycerol has a density of and a molecular weight of. If mL are mixed with a kg of water, what is a good estimate of the temperature at which this solution with freeze?
What is the value of Delta S when 2.7g of CH4 is compressed from 29.0 L to 18.0 L at a constant temperature of 100 C?
The calorimeter contains 1.00 kg of water (heat capacity of H2O = 4.184 J/g°C) and the heat capacity of the empty calorimeter is 0.10 kJ/°C. How much heat is released per gram of oil shale when it is burned?
Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol. IE1: 1314, IE2: 3389, IE3: 5298, IE4: 7471, IE5: 10992, IE6: 13329, IE7: 71345, IE8: 84087.
What kind of compound is 2,3-dihydroxypentane? From what precursor do you synthesize the kind of compound that 2,3-dihydroxypentane is?
An infant ibuprofen suspension contains 100 mg/5.0 mL suspension. The recommended dose is 10mg/kg of body weight.
a coffee cup calorimeter containing 100ml of 0.30M HCl at 20.3degrees celcius. when 1.82g of Zn solid is added, the temperature rises to 30.5 degrees celcius. what is the heat of reaction per mole of Zn.
If 1 gallon of paint can cover a square room and ceiling with walls that are 9.36 feet high and 9.36 long, what is the thickness of the paint (in micrometers)?
How is a "charge" different from a mortgage?
Calculate the number of moles of Cl atoms in 1.20×1024 of magnesium chloride, MgCl2.
When 2.45 g of an unknown weak acid HA with a molar mass of 85.0g /mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.256 C.
What is the sum of the charges on alanine, aspartic acid, and lysine? Describe how you could use salt solutions that contain cations to control the interaction between the stationary phase and the amino acids
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