Other Chemistry Answers

a chemical is heated in a test tube brown fumes come out and a black residue is left behind

1. name the chemical which gives brown fumes

2. write the equation

3. name the compound which gives black residue

impacts of sewage water on living beings

list the characteristic feature that you would expect to find the following an explosion in a building resulting from
1. a leakage of town gas
2. a leakage propane cylinder
3. a terrorist bomb

DEAR SIR
in determination H2S in crude oil at first H2S extract with Borax 3% then titrate with IODINE why do not we use NaOH?
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The Ksp value for lead sulfide, PbS, is 1.0x10^-28. What is the concentration of Pb2+ in a saturated solution of lead sulfide?

a) 1.0x10^-56
b) 1.0x10^-14
C) 3.3X10^-29
d) 0.5x10^-14

10 mole of Ba(NO3)2 dissolves in water to give how many NO3- ions?
1 - 6.02 x 10 to the 23
2 - 6.02 x 10 to the minus 23
3 - 6.02 x 10 to the 24
4 - 1.204 x 10 to the 23
5 - 1.204 x 10 to the 25

What I want to know is how do I work out the question.

what is the pH of a solution if [H+]= 1×10-5

1.4g sample of KHP required 24.11cm3 of NaOH for its complete neutralization. Calculate the molarity of the NaOH used in titration?

5 Gram Alloy Of Cu And Ag Dissolved In Dilute Nitric Acid And Solution Was Heated With Nacl To Get 2.87 Gram Agcl % Pf Silver In The Alloy Is?

right or wrong
1-the rate of evaporation is decrease with increase the surface of liquid
2-claude process is economically more expersive than linde process for liquefaction of gas