Which statement explains why sulfur is classified as a Group 16 element?
2 answers:
Answer : The correct option is (1).
Explanation :
Group 16 is the third last group in the periodic table and this group is called oxygen family.
The elements present in this group are oxygen, sulfur, selenium, tellurium and polonium.
Group 16 elements has 6 valence electrons in their outermost shell.
The electronic configuration of sulfur is .
Sulfur is classified as a group 16 element that means a sulfur has 6 valence electrons.
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Answer:
19,26 kJ
Explanation:
The work done when a gas expand with a constant atmospheric pressure is:
W = PΔV
Where P is pressure and ΔV is the change in volume of gas.
Assuming the initial volume is 0, the reaction of 500g of Zn with H⁺ (Zn(s) + 2H⁺(aq) → Zn²⁺(aq) + H₂(g)) produce:
500,0g Zn(s)××
= 7,648 moles of H₂
At 1,00atm and 303,15K (30°C), the volume of these moles of gas is:
V = nRT/P
V = 7,648mol×0,082atmL/molK×303,15K / 1,00atm
V = 190,1L
That means that ΔV is:
190,1L - 0L = <em>190,1L</em>
And the work done is:
W = 1atm×190,1L = 190,1atmL.
In joules:
190,1 atmL× = <em>19,26 kJ</em>
I hope it helps!