Need help ASAP! Describes volume?
1 answer:
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Answer:
Sulfur
Explanation:
<u>Valence electrons</u> are the group numbers. The group numbers are the numbers that go from left to right on the top. But since you can't have more than 8 valence electrons, the group numbers of 13-18, the valence electrons will actually be from 3-8. So 6 valence electrons would be group 16. That narrows it down a lot. The only elements in this group are oxygen, sulfur, selenium, tellurium, polonium, and livermorium.
Energy level are the period numbers. The period numbers are the numbers that go from top to bottom. So the 3rd energy level is the 3rd period. So when you look at the periodic table, under the 16 group and 3rd period, lies Sulfur.
Answer:
75 L
Explanation:
We assume that the gas in the container is an ideal gas, which is governed by the ideal gas equation : PV = nRT , where P is the pressure of the gas, V is the volume of the container, n is the number of mols of the gas, R is the universal gas constant and T is the temperature of the gas.
Here, R is a universal constant with a value of ≈ 8.314 J/mol-K. Also, given that temperature (T) is maintained constant. And since the container is closed, there is no exchange of the gas between the container and the surroundings, thus keeping the number of mols (n) of the gas constant. Hence, in the ideal gas equation, right hand side, i.e, nRT is a constant.
Initially the equation is:
Finally, the equation is:
Since, nRT is a constant,
It is given that, ,
and
.
Therefore, 100x45 = 60 x ⇒
Answer : The amount of energy released will be, -88.39 kJ
Solution :
The process involved in this problem are :
The expression used will be:
where,
= heat available for the reaction = ?
m = mass of water = 155.0 g
= specific heat of solid water =
= specific heat of liquid water =
= enthalpy change for fusion =
Molar mass of water = 18 g/mole
Now put all the given values in the above expression, we get:
Therefore, the amount of energy released will be, -88.39 kJ