Other Chemistry Answers

For this question: show in absolute DETAIL your steps and explain when appropriate that how you’re preparing the desired standards for the scenario outlined below. (20 pts)

You are required to prepare a series of dilution from a 1L of 25 ppm calcium stock solution in order to obtain a calibration curve for the analysis of several water samples by AA. If you consider the Ca standards to be made are: 0.10 ppm, 0.30 ppm, 0.50 ppm, 0.60ppm, 0.80 ppm, 1.00 ppm, 2.00 ppm, 3.00 ppm, 4.50 ppm and 5.00 ppm. Moreover, the only resources available to you are the following:

- Volumetric flasks of 50 ml only available in unlimited quantity
- Only pipettes available for the task are 2 ml, 3 ml and 5 ml and they are not graduated.

how many grams of nitrogen oxide two needed to win 20dm3 nitrogen oxide four.
2NO+02--->2NO2

Which of the following is an oxidation-reduction reaction?
ZnS(s) + 2O2(g) mc011-1.jpg ZnSO4(s)
CaO(s) + H2O(l) mc011-2.jpg Ca(OH)2(s)
6Li2O(s) + P4O10(g) mc011-3.jpg 4Li3PO4(s)
SO2(g) + H2O(l) mc011-4.jpg H2SO3(aq)

Sacrificial anodes are sometimes connected to steel using a copper wire. If the anode is completely corroded away and not replaced so that only the copper wire remains, what could happen where the copper and iron meet? Explain your answer.

describe the preparation of 100ml of 0.1 M HCl from a concentrated solution that has a specific gravity of 1.18 and is 37%(w/w) HCl ?

0.000431 express as an integer

What mass of dilute trioxonitrate(v)acid containing 10% weight per weight of pure acid would be required to desolve 2.5g chalk

how many O atoms are present in a 7.07 ng sample of quinine, C20H24O2N2? Note: 1 ng is one nanogram.

Discuss the expected spectral data for H2NCH2CH2OH.

Explain McLafferty rearrangement with the help of a suitable example.