To which one of the following reactions occurring at 25°c does the symbol δh°f[h2so4(l)] refer? a)2 h(g) + s(g) + 4 o(g) h2so4(l)b)h2(g) + s(g) + 2 o2(g) h2so4(l)c)h2so4(l)h2(g) + s(rhombic) + 2 o2(g)d)h2so4(l)2 h(g) + s(rhombic)+ 4 o(g)e)h2(g) + s(rhombic) + 2 o2(g)h2so4(l)

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explanation:

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.

answer: option (b) is the correct answer.

explanation:

intensive property is the physical property which does not depend on the size of system or amount of material present in system.

for example, color, density, melting point, boiling point etc are all intensive properties.

thus, we can conclude that the boiling point and color of a substance are both examples of intensive properties because they do not depend on the amount of matter in the sample.