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!
You are using the following procedure from your lab instructions to determine the copper content of a brass sample:
"Approximately 35 mg of a dried brass sample (accurately measured) is put into a 250-mL Erlenmeyer flask. About 20 mL of H2O and 10 mL of concentrated HNO3 is added. This sample is digested, then quantitatively transferred to a 100-mL volumetric flask and diluted to the mark. The sample is still too concentrated, so a 1:20 dilution is accomplished by transferring 5.00 mL of this solution to another 100-mL volumetric flask and diluting to the mark."
If you actually used a 39.5 mg sample of brass, and the resulting diluted solution was found to contain 13.6 mg/L of Cu, what is the %Cu in the sample?
What is the concentration in mol/L of a solution with 8.52g MgCl2 dissolved in 150.0ml of solution. What is the concentration of Mg2+ and Cl- ions.
In a separate experiment, all the sulphur in another 0.464 g sample was converted to 0.859 g of BaSO4. What is the empirical formula of the unknown compound
the same volume ofco2 at the same temp. and pressure is liberated from 1.000g of dolomite byadding an excess of hcl as
Consider the following electrochemical cell at 298 K. One compartment contains a 1.00-M solution of silver nitrate. The other compartment contains a saturated solution of silver iodide
you decide to use gel filtration. this works brilliantly and you determine that your protein is 80kda at the same time.
Ammonia gas is produced by reacting hydrogen gas with nitrogen gas. To produce 450 g of ammonia gas using air as your source of nitrogen gas, what volume of air is required if the air is introduced at 25°C and 740 mmHg
for a certain chemical reactiondelta h -156kj . assuming the reaction is at equilibrium classify each of the following
How much 5.90 M NaOh must be added to 570.0 mL of a buffer that is 0.0210 M acetic acid and 0.0230 M sodium acetate to raise the pH to 5.75
A 13 gram sample of calcium reacts with bromine to form 24 grams of calcium bromide. How many grams of bromine are used in the reaction?
benzene ring with a 2 carbonyl joined by an O in the middle and a iso propal group is on the other carbonyl. (would be a symmetric anhydride if it weren't for the benzene and isop-ropral substituents on the two carbonyls)
Is the radial node of the hydrogen 2s wavefunction inside or outside (relative to the nucleus) of the most probable radius of the 1s state?
(a) What is teh rate law for the reaction. what is the value of the rate constant
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