Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is Zn2+(aq)+2e−→Zn(s)
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Answer :
(a) The molar mass of is, 165.5 g/mole
(b) The moles of is, 3.02 moles
(c) The mass in grams of mole chloral hydrate is, 3.31 g
(d) The number of chlorine atoms in 5.0 g chloral hydrate is,
(e) The mass of chloral hydrate will be, 1.55 g
(f) The mass of exactly 500 molecules of chloral hydrate is,
Explanation :
(a) To calculate the molar mass of chloral hydrate.
The formula of chloral hydrate is,
Atomic mass of carbon = 12 g/mole
Atomic mass of hydrogen = 1 g/mole
Atomic mass of oxygen = 16 g/mole
Atomic mass of chlorine = 35.5 g/mole
Now we have to determine the molar mass of chloral hydrate.
=2(12g/mole)+3(1g/mole)+3(35.5g/mole)+2(16g/mole)=165.5g/mole[/tex]
The molar mass of is, 165.5 g/mole
(b) Now we have to determine the moles of .
The moles of is, 3.02 moles
(c) Now we have to determine the mass in grams of mole chloral hydrate.
The mass in grams of mole chloral hydrate is, 3.31 g
(d) To calculate the number of chlorine atoms are in 5.0 g chloral hydrate.
First we have to determine the moles of .
Now we have to calculate the number of chlorine atoms in chloral hydrate.
In , there are, 2 carbon atoms, 3 hydrogen atoms, 3 chlorine atoms and 2 oxygen atoms.
As, 1 mole of contains
chlorine atoms
So, 0.03 mole of contains
chlorine atoms
The number of chlorine atoms in 5.0 g chloral hydrate is,
(e) To calculate the mass of chloral hydrate would contain 1.0 g Cl.
As, of chlorine present in 165.5 g of
So, 1 g of chlorine present in of
The mass of chloral hydrate will be, 1.55 g
(f) To calculate the mass of exactly 500 molecules of chloral hydrate.
As, molecules of chloral hydrate has 165.5 g mass of chloral hydrate
So, 500 molecules of chloral hydrate has mass of chloral hydrate
The mass of exactly 500 molecules of chloral hydrate is,