Other Chemistry Answers

solution to Analysis of a sample of iron ore gave the following percentage values for the iron content 7.08,7.21.7.12,7.09,7.16, 7.14,7.07,7.14,7.18,7.11.Calculat the mean, standard deviation and coefficient of variation for the values.

Determine the weight of Na2SO4 dissolved in 700 grams of water if the solution has a concentration of 54.5% by weight?

In SATP to increase 1 mole gas volume to 40L, how much temperature should increase if pressure is half decreased---
1.389.43K
2.91.43°C
3.298K
4.116.43°C

Cac2O4 solubility is much in ----
1.water
2.poh=13
3.ph= 8. ( in solution)
4.0.02M HNO3

Which electron configuration is formed in normal and which one is different.
1.Th
2.Pt
3.Te
4.Ce

Cac2O4 solubility is much in ----
1.water
2.poh=13
3.ph= 8. ( in solution)
4.0.02M HNO3


In SATP to increase 1 mole gas volume to 40L, how much temperature should increase if pressure is half decreased---
1.389.43K
2.91.43°C
3.298K
4.116.43°C

22gm CO2 vander wal's equation ?

Four MCQ type question please explain with the answer.

A strong absorption band in the IR region is observed at ṽ = 2170 cm-1 for 12C16O. Assuming it as a harmonic oscillator, calculate its fundamental frequency, v in units of inverse seconds and zero point energy in joules.

Explain the origin of two D-lines in the
atomic spectrum of Na

Good evening,i just want to ask regarding the lipemic sample with electrolytes test and lipd profile test and the result of triglyceride was 6000 and after ultracentrifugation it was 1600 which result to be released in all parameters the ultracentrifuged sample or the normal one thanks

Find ΔHrxn for this reaction as written. (Use 1.0 g/mL for the density of the solution and 4.18 J/g⋅∘C as the specific heat capacity.)

If the first order rate constant for the decomposition of a certain antibiotics in water is 25 ̊C is 1.30 year-1 .
(i) If a 5×10-3 mol/dm3 solution of these antibiotics is stored at 25˚C for 30 days, what is the concentration of the antibiotics?
(ii) How long will it take for the concentration of the antibiotics to reach 1.0×10-3 mol/dm3?