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Mole fraction of solvent in 0.2m binary aqueous solution of camphor(m=molality)
Correct answer is option (A) i.e 0.996
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What is the mass of (a) 1 mole of nitrogen atoms? (b) 4 mole of aluminium atoms (Atomic mass of aluminium = 27)?
(a) The mass of 1 mole of nitrogen atoms is 14g. (b) The mass of 4 moles of aluminium atoms is (4 × 27)g = 108g (c) The mass of 10 moles...
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What is the mass of: (a) 0.2 mole of oxygen atoms? (b) 0.5 mole of water molecules?
(a) Mass of one mole of oxygen atoms = 16g Then, mass of 0.2 mole of oxygen atoms = 0.2 × 16g = 3.2g (b) Mass of one mole of water molecule...
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Verify by calculating that 5 mole of CO2 and 5 mole of H2S do not have the same mass. (Atomic mass of C = 12 u, O = 16 u, H = 1 u, S = 32 u)
Molecular mass of CO2 = 1(C) + 2(O) = 1(12) + 2(16) = (1 × 12) + ( 2 × 16) = 44 u 5 mole of CO2 = 5 × 44 = 220 gm Molecular mass...
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What is the fraction of the mass of water due to neutrons?
- 8/18 Mass of one mole (Avogadro Number) of neutrons - 1 g Mass of one neutron = 1 / Avogadro Number (NA)g Mass of one molecule of water = Molar mass / NA ...
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Compute the difference in masses of one mole each of aluminium atoms and one mole of its ions.
Mass of 1 mole of aluminium atom = the molar mass of aluminium = 27 g mol–1 An aluminium atom needs to lose three electrons to become an ion, Al3+ For one mole...
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Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.
We can see any object, when light reflected by that object reaches our eyes. But in the dark room, no light is reflected by the object so we are unable...
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In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror?
No, to see the reflection, source of light is required. We can see only in the presence of light.
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If you happen to go to a desert, what changes do you expect to observe in the urine you excrete? You would
(i) excrete small amount of urine. (iii) excrete concentrated urine.
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Imagine you are a member of a fishing family and you are discussing whether to take a loan from the bank for an engine. What would you say?
If I were a member of fishing family, I would say we must take loan from the bank for an engine to improve the condition of our occupation because : (i) The...
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