You did not link an image of it so I can’t see the rings.
5.00 moles of a binary, group 2 oxide are found to have a mass of 521 g. The group 2 metal is Strontium.
According to question 5 moles of binary group 2 metal oxide mass =521 g
So, 1-mole metal oxide mass will be =521 / 5=104.2 g
Now, as metal oxide is group 2 oxide so metal: oxygen =1: 1
So the mass of metal is =104.2-16=88.2 gm (as the atomic mass of oxygen is 16 g
Therefore, the metal is Strontium(Sr) whose atomic mass is 87.62 g which is nearly 88.2 gm
So, the formula of metal oxide is SrO
The group two metal here is Sr which is strontium and lies in the same group as calcium.
To learn more about group 2 metals, visit:
brainly.com/question/18328178
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Answer:
a
b
c
Explanation:
From the question we are told that
The reaction of cyclobutane and oxygen is
ΔH°f (kJ mol-1) : C4H8(g) = 27.7 ; CO2(g) = -393.5 ; H2O(g) = -241.8 ΔH° = kJ
Generally ΔH° for this reaction is mathematically represented as
![\Delta H^o _{rxn} = [[4 * \Delta H^o_f (CO_2_{(g)} ) + 4 * \Delta H^o_f(H_2O_{(g)} ] -[\Delta H^o_f (C_2H_6_{(g)} + 6 * \Delta H^o_f (O_2_{(g)}) ] ]](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo%20_%7Brxn%7D%20%3D%20%5B%5B4%20%2A%20%5CDelta%20H%5Eo_f%20%28CO_2_%7B%28g%29%7D%20%29%20%2B%204%20%2A%20%5CDelta%20H%5Eo_f%28H_2O_%7B%28g%29%7D%20%5D%20-%5B%5CDelta%20H%5Eo_f%20%28C_2H_6_%7B%28g%29%7D%20%2B%206%20%2A%20%5CDelta%20H%5Eo_f%20%28O_2_%7B%28g%29%7D%29%20%5D%20%5D)
=> ![\Delta H^o _{rxn} = [[4 * (-393.5) + 4 * (-241.8) ] -[ 27.7 + 6 * 0]](https://tex.z-dn.net/?f=%5CDelta%20H%5Eo%20_%7Brxn%7D%20%3D%20%5B%5B4%20%2A%20%28-393.5%29%20%2B%204%20%2A%20%28-241.8%29%20%5D%20-%5B%2027.7%20%2B%206%20%2A%200%5D)
=>
Generally the total heat capacity of 4 mol of CO2(g) and 4 mol of H2O(g), using CCO2(g) = 37.1 J K-1 mol-1 and CH2O(g) = 33.6 J K-1 mol-1. C = J K-1 is mathematically represented as
![H = [ 4 * C_{CO_2_{(g)}} + 6* C_{CH_2O_{(g)}}]](https://tex.z-dn.net/?f=H%20%20%3D%20%5B%204%20%2A%20C_%7BCO_2_%7B%28g%29%7D%7D%20%2B%206%2A%20C_%7BCH_2O_%7B%28g%29%7D%7D%5D)
=> ![H = [ 4 * 37.1 + 6* 33.6 ]](https://tex.z-dn.net/?f=H%20%20%3D%20%5B%204%20%2A%2037.1%20%2B%206%2A%2033.6%20%5D)
=>
From the question the initial temperature of reactant is 
Generally the enthalpy change(
) of the reaction is mathematically represented as
=> 
=>
Answer:
this is an example of a Simple sentence
Answer: Option (C) is the correct answer.
Explanation:
The degree of randomness or disorder is known as entropy. This means that more randomly or rapidly the molecules of a substance are moving in a container or in the Universe more will be its entropy.
For example, gases move more rapidly that solids or liquids and hence gases have high entropy.
Therefore, we can conclude that entropy measures disorder.
