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Subject: Chemistry, asked on 17/9/16

​​what do we mean by the other states of matter such as plasma state and bose einstein condensate ??   how can these be justified by the equations of state (specially the virial equation of state)

Subject: Chemistry, asked on 1/4/16

I don't understandavogadro's law . how can different gases have the sameno. of molecules under the same pressure and temperature? won't they have different densities hence resulting in different no. of molecules. pls explain.

Subject: Chemistry, asked on 19/9/16

The stoichiometryof the following reaction is?

K2S2O8(aq) + 2KI(aq) -----> 2K2SO4(aq) + I2(aq)

a) 2:1 b)1:2 c)2:2 d)1:3

Subject: Chemistry, asked on 29/8/16

1. Calculate the amount of CO2 produced when 1mol of carbon is burnt in 16g of O2.
b) How many hydrogen atoms are present in 64u of methane?

Subject: Chemistry, asked on 29/8/16

1. ) Calculate the percentage composition of nitrogen in urea (NH2CONH2).
b) Calculate the number of atoms present in 11.2 litres of oxygen at S.T.P.

Subject: Chemistry, asked on 29/8/16

20g of CaCO3is treated with 20g of HCl to produce CO2.Which is the limiting reagent? How many grams of CO2 can be produced according to the reaction?
CaCO3(s) + 2HCl(aq) ------à CaCl2(aq) + H2O(l) + CO2(g)
b) The mass of 44.8 ml of a gas at S.T.P is found to be 0.22g.Calculate its molecular mass.
c) State the law of multiple proportions?

Subject: Chemistry, asked on 22/8/16

A compound is found to contain 11.2% nitrogen, 3.2% hydrogen, 41.2% chromium and 44.4% oxygen. Calculate the stoichiometric (empirical) formula.

Subject: Chemistry, asked on 10/8/16


PLEASE EXPLAIN THIS I CANNOT UNERSTAND

Subject: Chemistry, asked on 2/8/16

The vapour density of a mixture of gas A (Molecular mass = 40) and gas B (Molecular mass = 80) is 25.
Then mole % of gas B in the mixture would be

Subject: Chemistry, asked on 30/7/16

A + B  A3B2 (unbalanced)
A3B2 + C  A3B2C2 (unbalanced)
Above two reactions are carried out by taking 3 moles each of A and B and one mole of C. Then which
option is/are correct ?
(A) 1 mole of A3B2C2 is formed (B) 1 2 mole of A3B2C2 is formed
(C) 1/2 mole of A3B2 is formed (D) 1 2 mole of A3B2 is left finally

Subject: Chemistry, asked on 21/7/16

Didn't understand how to solve the question given in the video under the heading laws of chemical combination in the chapter, some basic concepts of chemistry?

Subject: Chemistry, asked on 21/7/16

PLZ GIVE THE ANS

Subject: Chemistry, asked on 20/7/16

PLZ GIVE THE ANSWER

Subject: Chemistry, asked on 19/7/16

A mixture of methane and oxygen has a vapour density 10. The percentage (by mole ) of methane is
A. 25
B. 50
C. 75
D. 40

Subject: Chemistry, asked on 16/7/16

ametal oxide contains 32% oxygen, if grammolar mass of metal is 51gm. formula of oxide of metal is?

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