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A gas such as carbon monoxide would be most likely to obey the ideal gas law at
high temperatures and low pressures
low temperatures and high pressures
high temperatures and high pressures
low temperatures and low pressures
A.
high temperatures and low pressures
Real gases show ideal gas behaviour at high temperatures and low pressures.
PV = nRT
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If Avogadro number NA, changed from 6.022 x 1023 mol-1 this would change
the definition of mass in units of grams
the mass of one mole of carbon
the ratio of chemical species to each other in the balanced equation
the ratio of elements to each other in a compound
B.
the mass of one mole of carbon
If Avogadro number NA, is changed from 6.022 x 1023 mol-1 to 6.022 x 1020 mol-1 this would change the mass of one mole of carbon.
therefore,
1 mole of carbon has mass = 12 g
or 6.022 x 1023 atoms of carbon have mass = 12 g
therefore, 6.022 x 1020 atoms of carbon have mass
What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?
12.65
2.0
7.0
1.04
A.
12.65
When equal volumes of acid and base are mixed then resulting solution become alkaline if the concentration of base is taken high.
Let normality of the solution after mixing 0.1 M
NaOH and 0.01 M HCl is N.
therefore, N1V1 - N2V2 = NV
or 0.1 x 1 - 0.01 x 1 = N x 2
Since normality, of NaOH, is more than that of HCl. Hence, the resulting solution is alkaline.
Or
[OH-] = N = 0.09/2 = 0.045 N
Or pOH = - log (0.045) = 1.35
therefore, pH = 14-pOH
= 14 - 1.35 = 12.65
Decreasing order of stability of 
is
A.
order of stability directly proportional to the bond order
therefore, the order of the stability of given species,
Which one of the following pairs of the solution is not an acidic buffer?
HClO4 and NaClO4
CH3COOH and CH3COONa
H2CO3 and Na2PO4
H2PO4 and Na3PO4
A.
HClO4 and NaClO4
A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it.
HClO4 and NaClO4 are not an acidic buffer because strong acid with its salt cannot form buffer solution.Sponsor Area
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