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Iron<span> and steel </span>rust<span> when they come into contact with water and oxygen. They </span>rust<span> faster in salty water or acid rain. Aluminium, on the other hand, does not corrode easily, because its surface is protected by a layer of aluminium oxide.</span>
Answer:
14
Explanation:
Silicon has atomic number 14, so its nucleus contains 14 protons
no. of protons + no. of neutrons = atomic mass number
p + n = A
14 + n = 28
n = 28 - 14 = 14
An atom of Si-28 contains 14 neutrons.
Numbers of moles = weight (g) / molecular weight (g/mole)
47000 metric tons = 47000000000 g
∵ molecular weight of sulfuric acid = 98 g/mole
∴ No. of moles of sulfuric acid = 47000000000/98 = 479591836.73 moles