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Yeneta

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4 L of oxygen at a pressure of 400 Kpa and 1L of nitrogen at 200 Kpa were introduced in to 2 L vessel.(A)What is the total
1. 1 answer
2. 745 views
A solution contains 15 g non-volatile non-electrolyte solute C6H14O6 dissolved in 500 g of water at 40 c.Calculate (A)Vapor
1. 1 answer
2. 568 views
H2SO4 solution containing 200.1 g of H2SO4 in 0.3500 L OF solution has a density of 1.3294 g/ml.calculate(A) Mass%H2SO4(m/m)
1. 1 answer
2. 1,027 views
H2SO4 solution containing 200.1 g of H2SO4 in 0.3500 L OF solution has a density of 1.3294 g/ml.calculate(A) Mass%H2SO4(m/m)
1. 2 answers
2. 557 views
If the dimension of a right rectangular prism are 7cm,9cm and 3cm,then find(A) Its total surface area (B) Its volume (C) the
1. 4 answers
2. 1,630 views
Explean the chinese proverb "I hear and I forget;I see and I remember;I do and I understand",from instructional materials and
1. 2 answers
2. 581 views
List three advantages and three disadvantages of improvised apparatus in teaching chemistry?
1. 2 answers
2. 4,803 views
What is the reason that chemists chatagories Fe,Co and Ni in the same group VIIIB?
1. 0 answers
2. 387 views
Distinguish between an absorption spectrum and an emission spectrum.with which did bohr work?
1. 2 answers
2. 1,098 views
An electron in the n=5 level of an H atom emit a photon of wavelength 1281nm. To what energy level does the electron move?
1. 1 answer
2. 1,815 views
In what ways are microwave and ultraviolet radiation the same? In what ways are they different?
1. 1 answer
2. 2,882 views
Which of the following is most likely to deviate from ideal ga7 behavior?(A)He (B)Ar (c) Cl2 (d) CCl2F2
1. 1 answer
2. 525 views
The solubility of sodium selenate is 84 g/100 g of water at 35 oC. If a solution is obtained by dissolving 92 g of sodium
1. 4 answers
2. 989 views
Why does a pressure cooker reduce cooking time?
1. 1 answer
2. 394 views
2S2O3 2- + I2 => S4o6 2- + 2I -If,in an experiment,0.05 mol S2O3 2- is consumed in 1.0L of solution each second,at what rates
1. 1 answer
2. 923 views
A reaction is 50% complete in 2 hours and 75% complete in 4 hours. What is the order of this reaction?
1. 1 answer
2. 378 views
Which of ions most abondant in sea water Na+ ,Ca2+ ,Cl-,HCO3-
1. 1 answer
2. 390 views
Which of the following is exothermic?A.boiling of water B.person growing C.choppening of tree D.freezing of water
1. 1 answer
2. 803 views

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