Answer:
Mass, m = 7.97 grams
Explanation:
We have,
Initial temperature was 34 degrees Celsius
Heat produced in it is 100 calories of heat
The specific heat capacity of water is 4.18 J/g °C
The heat produced due to change in temperature is given by :
![Q=mc(T_f-T_i)](https://tex.z-dn.net/?f=Q%3Dmc%28T_f-T_i%29)
m is mass of water in grams
![m=\dfrac{Q}{c(T_f-T_i)}\\\\m=\dfrac{2200}{4.18\times (100-34)}\\\\m=7.97\ g](https://tex.z-dn.net/?f=m%3D%5Cdfrac%7BQ%7D%7Bc%28T_f-T_i%29%7D%5C%5C%5C%5Cm%3D%5Cdfrac%7B2200%7D%7B4.18%5Ctimes%20%28100-34%29%7D%5C%5C%5C%5Cm%3D7.97%5C%20g)
So, 7.97 grams of water is required to produce heat of 2200 joules.
I think the major difference is that 0.5 is exactly equal to a half. The other 0.555555 is equal to a half plus five hundredths plus thousandths plus five ten thousandths plus five hundred thousandths, plus five millionths and so forth; and therefore it is greater than 0.5. In other words 0.555555 is called a recurring decimal.
Answer:
Answer is given below.
Explanation:
Anode is that electrode where oxidation occurs. Cathode is that electrode where reduction occurs.
In cell representation, half cell present left to salt-bridge notation
is anodic system and another half cell present right to salt-bridge notation
is cathodic system.
So anode is Cu and cathode is Ag.
oxidation: ![Cu-2e^{-}\rightarrow Cu^{2+}(aq.)](https://tex.z-dn.net/?f=Cu-2e%5E%7B-%7D%5Crightarrow%20Cu%5E%7B2%2B%7D%28aq.%29)
[reduction:
]![\times 2](https://tex.z-dn.net/?f=%5Ctimes%202)
-----------------------------------------------------------------------------------------------
chemical equation: ![Cu+2Ag^{+}(aq.)\rightarrow Cu^{2+}(aq.)+2Ag](https://tex.z-dn.net/?f=Cu%2B2Ag%5E%7B%2B%7D%28aq.%29%5Crightarrow%20Cu%5E%7B2%2B%7D%28aq.%29%2B2Ag)
Oxidizing agent is that species which takes electron from another species. Here
takes electron from Cu. Hence
is the oxidizing agent.
Reducing agent is that species which gives electron to another species. Here Cu gives electron to
. Hence Cu is the reducing agent.
The answer is B. Western Line