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 valuable archeological flint arrowhead is to be examined for nickel as a trace component by ED-XRF (x-ray fluorescence). Flint is a silica material similar to quartz. A blank nickel-free quartz sample yields a signal of 7.8 units of intensity. The arrowhead yields an intensity of 115.6 units. A standard reference materials of nickel in quartz are purchased that has 44.2 micrograms of nickel per g of quartz. This standard material is utilized to yield 78.9 units of XRF intensity under the same conditions.
1. Explain what is the mass percentage of nickel in the arrowhead
2. Comment on any other information which this experiment might yield about this arrowhead
3. Explain what advantage does XRF have in this situation over ICP-AES
Classify each of the following compounds as ionic or molecular. If it is ionic, classify it as a Type I or Type II ionic compound. CoCl2, CF4, BaSO4, NO
The meat from one hazelnut has a mass of 0.985 g. a. What is the mass of a millionth of a mole (10^-6) of hazelnut meats. b. How many moles are in a pound of hazelnut meats
What is the volume occupied by one mole of helium at 0°C and 1 atm pressure?
The MnO4(-) is often used to analyze for the Fe(2+) content of an aqueous solution via the reaction MnO4(-)+Fe(2+)---> Fe(3+)+Mn(2+) in acidic solution. What is the ration Fe(2+):MnO4(-) in the balanced equation
The johns family has a water tank that can deliver 10,000 cu ft of CO2 qt 20 degrees celcius with a pressure of 1ATM If the johns tank volume was cut in half and the pressure increasses
If a sample containing 3.00 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
Determine if Ni should dissolve easily in Cu. Show that your determination is correct by providing the Cu-rich side of the appropriate equilibrium phase diagram.
If the rate constant of a first order reaction is 4.87 x10-5s-1 at 15 deg C. Compute the rate constant at 80 deg C if the activation energy is 250Kj/mle (R=8.314J/K mole)
Determine the following characteristics of the titration curve for 20.0 mL of 0.20 m NH3(aq) tiltreated with 0.25 m HI(aq) A) The initial pH B) The volume of 0.30 M HI at the equivalence point c) The pH at the half equivalence point
Give the chemical equation for the reaction that occurs in (B) to reach equilibrium.
identify organic compounds in medications. determine the structure of one active component and identify three functional groups on each molecule.
What is the molarity of the NaBr produced when 50.0 mL of 4.80 M NaOH is mixed with 150.0 mL of 1.60 M HBr
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