<em>what</em><em> </em><em>are</em><em> </em><em>the</em><em> </em><em>terms</em><em> </em><em>that</em><em> </em><em>need</em><em> </em><em>to</em><em> </em><em>be</em><em> </em><em>defined</em><em> </em><em>?</em>
It would be 4.6cgL not sure tho because I didint do that good in this
Answer: ![156.4^0C](https://tex.z-dn.net/?f=156.4%5E0C)
Explanation:
![\Delta H=-6542kJ](https://tex.z-dn.net/?f=%5CDelta%20H%3D-6542kJ)
To calculate the moles, we use the equation:
![\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{7.700g}{78.11g/mol}=0.9858moles](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20moles%7D%3D%5Cfrac%7B%5Ctext%7BGiven%20mass%7D%7D%7B%5Ctext%20%7BMolar%20mass%7D%7D%3D%5Cfrac%7B7.700g%7D%7B78.11g%2Fmol%7D%3D0.9858moles)
According to stoichiometry :
2 moles of
releases = 6542 kJ of heat
0.9858 moles of
release =
of heat
Thus heat given off by burning 7.700 g of
will be absorbed by water.
![Q=m\times c\times \Delta T](https://tex.z-dn.net/?f=Q%3Dm%5Ctimes%20c%5Ctimes%20%5CDelta%20T)
Q = Heat absorbed= 3224kJ = 3224000J (1kJ=1000J)
m= mass of water = 5691 g
c = specific heat capacity = ![4.184J/g^0C](https://tex.z-dn.net/?f=4.184J%2Fg%5E0C)
Initial temperature of the water =
= 21.0°C
Final temperature of the water =
= ?
Putting in the values, we get:
![3224000J =5691g\times 4.184J/g^0C\times (T_f-21)](https://tex.z-dn.net/?f=3224000J%20%3D5691g%5Ctimes%204.184J%2Fg%5E0C%5Ctimes%20%28T_f-21%29)
![T_f=156.4^0C](https://tex.z-dn.net/?f=T_f%3D156.4%5E0C)
The final temperature of the water is ![156.4^0C](https://tex.z-dn.net/?f=156.4%5E0C)
Atomic mass of the parent element =247,
atomic number of the parent element = 95
In the process of β-decay electron leaves the nucleus, so instead of one neutron we get one proton.
Mass of proton≈mass of neutron,
so atomic mass will not change.
Charge of proton =+1, and charge of neutron = 0.
So, we will get atomic number increased by one.
New element (daughter) will have
atomic mass = 247,
and atomic number= 95+1=96
Number 95 - Am (parent),
number 96 - Cm(daughter),
So, from Am-247 we will get Cm-247.