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Yeneta
Questions and answers by visitors named
Yeneta
Questions (18)
Which of the following is exothermic?
A.boiling of water B.person growing C.choppening of tree D.freezing of water
2 answers
765 views
Which of ions most abondant in sea water Na+ ,Ca2+ ,Cl-,HCO3-
1 answer
359 views
A reaction is 50% complete in 2 hours and 75% complete in 4 hours. What is the order of this reaction?
1 answer
344 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
2 answers
868 views
Why does a pressure cooker reduce cooking time?
1 answer
367 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
5 answers
923 views
Which of the following is most likely to deviate from ideal ga7 behavior?
(A)He (B)Ar (c) Cl2 (d) CCl2F2
2 answers
487 views
In what ways are microwave and ultraviolet radiation the same? In what ways are they different?
4 answers
2,815 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?
3 answers
1,731 views
Distinguish between an absorption spectrum and an emission spectrum.with which did bohr work?
5 answers
1,035 views
What is the reason that chemists chatagories Fe,Co and Ni in the same group VIIIB?
1 answer
349 views
List three advantages and three disadvantages of improvised apparatus in teaching chemistry?
4 answers
4,755 views
Explean the chinese proverb "I hear and I forget;I see and I remember;I do and I understand",from instructional materials and
3 answers
533 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
6 answers
1,560 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)
3 answers
507 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)
2 answers
984 views
A solution contains 15 g non-volatile non-electrolyte solute C6H14O6 dissolved in 500 g of water at 40 c.
Calculate (A)Vapor
2 answers
518 views
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
2 answers
684 views
