Radon dose comes primarily from its daughter products which are ?
a. ingested
b. counted
c. inhaled
d. touched

Answerevaporation of ocean water into the atmosphere

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Answer is: -1300 kj/mol.p₄(s) + 3o₂(g) → p₄o₆(s), ∆h(p₄o₆(s))  = -1640,1 kj/mol.p₄(s) + 5o₂(g) → p₄o₁₀(s), ∆h(p₄o₁₀(s))  = -2940,1 kj/mol.δh(o₂) = 0 kj/mol.δh(reaction) = δh(reactants) - δh(product of reaction)δh(reaction) =  δh(p₄o₁₀) -    δh(p₄o₆).δh(reaction) = -2940,1 kj/mol  - (-1640,1 kj/mol) = -1300 kj/mol.