Other Chemistry Answers

Among the following weakest conjugate base is

NO3-
CI-
CIO4-
CH3COO-

Ionic product of water is 4* 10^-13 at a particular temperature (t^0 C).The neutral point based on a pH scale at t^0 is

Dear sir
i want to determine water (100 ppm)in condensate sample by karlfisher coulometry method but our sample have H2S concentration 600 ppmwt can interfere with karlfischer solution in ASTM E203 CORRECTION IS ONLY FOR MERCAPTAN can you guide me how can i?
best regards
EDWARD

X2 + 3Y2 --> 2XY3 triangle H1= -320 kJ
X2 + 2Z2 --> 2xZ2 triangle H2= -170 kJ
2Y2 + Z2 --> 2Y2Z triangle H3= -250 kJ
Calculate the change in enthalpy for the following reaction:
4XY3 + 7Z2 --> 6Y2Z + 4XZ2
Triangle H =____?___ kJ

if 50.0 g of silicon dioxide is heated with 25.0 g of C, 28.0 g of silicon carbide and 30.0 g of CO is produced.
SiO2 + C --> SiC +CO
what is the theoretical yield and % yield for each product of this reactant?

Dissolving 3.00 g of an impure sample of calcium carbonate in hydrochloric acid produced 0.656 L
of carbon dioxide (measured at 20.0°C and 792 mmHg). Calculate the percent by mass of calcium
carbonate in the sample. State any assumptions.

1.What type of starch is suitable for production of Bio-plastics?

2.Can you suggest some articles and books to understand well about production of Bio-plastics and design of plant?

How much heat is produced by the complete combustion of 265g of CH4?
CH4(g)+2O2(g)→CO2(g)+2H2O(g)ΔH∘rxn=−802.3kJ

A company produces plastic elephants in two colours for the novelty trade market. Production in the factory is on one of three machines; 10% is on machine A, 30% on machine B, and the remainder on machine C. Machine A’s production consists of 40% blue elephants and 60% pink elephants. Machine B’s production consists of 30% blue elephants and 70% pink elephants. Machine C’s production has 80% pink elephants with the remainder being blue.
2.1.1 What proportion do blue elephants form of total production? (5)
2.1.2 If a particular elephant is pink, what is the probability it was made by machine B? (5)
2.2 You have been given the probability distributions of possible profits from two projects, A and B:

0.10 g glycine and 0.4 ml water taken in 5 ml conical vial. Warmed slightly to dissolve the glycine. 0.3 rnl acetic anhydride added and stirred for about 5 min. Mixture cooled in ice bath for 10 min. Precipitate collected by suction filtration and washed with a few ml water. Clystais spread over a piece olfiiter papel or watch glass and air dried for i0 min. Mass and melting point of product recorded. Glycine dissolved after about 20 sec when warmed in gl5 cine water mixture' White, needle-shaped crystals formed when reaction mixture cooled in ice. 0.14 g. of solid obtained after f,rltration and drying of product. mp of crystals recorded as 205-207 n Solid product possibly still slightly wet. Conclusion: crystallized material was in fact acetanilide, based on its melting point. Not highly pure. A second crystallization should produce a fairly pure material, but it would also decrease