Moles of iron = 7.30
<h3>Further explanation</h3>
Given
mass of iron = 408.67 g
Required
moles of atoms
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass
mol iron-Fe (Ar = 56 g/mol)
mol = mass : MW
mol = 408.67 g : 56
mol = 7.30
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Answer
is: the final pressure of the gas is closest to 3,17 atm.
<span><span>
p</span>₁ =
3,2 atm.</span><span>
T₁ =
310 K.</span><span>
V₁ =
6 L.</span><span>
p₂ = ?</span><span>
T₂ =
410K.</span><span>
V₂ = 8,0 L.</span><span>
<span>Use combined gas law - the volume of amount of gas is proportional to the ratio of
its Kelvin temperature and its pressure.</span><span>
p</span></span><span>₁V₁/T₁ =
p₂V₂/T₂.</span><span>
<span>3,2 atm · 6,0 L ÷ 310 K = p</span>₂ · 8,0 L ÷ 410 K.</span><span>
0,0619 = 0,0195p</span><span>₂.</span><span>
p</span><span>₂ =
3,17 atm.</span>
Answer:
It is used to measure size or distance.
