Complete Question
A sample of aluminum, which has a specific heat capacity of 0.897 JB loc ! is put into a calorimeter (see sketch at right) that contains 200.0 g of water. The aluminum sample starts off at 85.6 °C and the temperature of the water starts off at 16.0 °C. When the temperature of the water stops changing it's 20.1 °C. The pressure remains constant at 1 atm. Calculate the mass of the aluminum sample.
Answer:
![M=58g](https://tex.z-dn.net/?f=M%3D58g)
Explanation:
From the question we are told that:
Heat Capacity ![H=0.897](https://tex.z-dn.net/?f=H%3D0.897)
Mass of water ![M=200g](https://tex.z-dn.net/?f=M%3D200g)
Initial Temperature of Aluminium ![T_a=85.6](https://tex.z-dn.net/?f=T_a%3D85.6)
Initial Temperature of Water ![T_{w1}=16.0](https://tex.z-dn.net/?f=T_%7Bw1%7D%3D16.0)
Final Temperature of Water ![T_{w2}=16.0](https://tex.z-dn.net/?f=T_%7Bw2%7D%3D16.0)
Generally
Heat loss=Heat Gain
Therefore
![M*0.897*(85.6-20.1) =200*4.184*(20.1-16)](https://tex.z-dn.net/?f=M%2A0.897%2A%2885.6-20.1%29%20%3D200%2A4.184%2A%2820.1-16%29)
![M=58g](https://tex.z-dn.net/?f=M%3D58g)
Answer:
Normalidad = 4N
%p/V = 27.6%
Explanation:
La solución 2M de carbonato de potasio contiene 2moles de carbonato por litro de solución. La normalidad son los equivalente de carbonato de potasio (2eq/mol) por litro de solución:
2moles * (2eq/mol) = 4eq / 1L = 4N
El porcentaje peso volumen es el peso de carbonato en gramos dividido en el volumen en mL por 100:
%p/V:
Masa K2CO3 -Masa molar: 138.205g/mol-
2moles * (138.205g/mol) = 276g K2CO3
Volumen:
1L * (1000mL/1L) = 1000mL
%p/V:
276g K2CO3 / 1000mL * 100
<h3>%p/V = 27.6%</h3>
Answer:
Somatotropin(Growth Hormone)
Explanation:
-Uncontrolled growth in a person is usually caused by the excessive secretion of growth hormone.
-This hormone is also known as Somatotropin.
-This hormone is produced in the pituitary gland.