Answer:
loses one or more electrons from its valence shell
Explanation:
Find out how many molecules there are in 2moles
To do this multiply avagadro's constant by 2 (6.02x10^23 * 2)
This gives 1.204x10^24 molecules
For every molecule you have 4 oxygen atoms so do 1.204x10^24 * 4
Answer = 4.816x10^24
Answer:
An object could be traveling at a constant speed, but change directions
Explanation:
Hope that helps
Answer:
![T_f=343.14^{\circ} C](https://tex.z-dn.net/?f=T_f%3D343.14%5E%7B%5Ccirc%7D%20C)
Explanation:
Given that,
The heat capacity of solid iron is 0.447 J/g°C.
Mass, m = 450 g
Initial temperature, ![T_i=20^{\circ} C](https://tex.z-dn.net/?f=T_i%3D20%5E%7B%5Ccirc%7D%20C)
Let the heat transferred, Q = 65 kJ
We need to find the final temperature. The heat transferred is given by :
![Q=mc\Delta T\\\\Q=mc(T_f-T_i)\\\\Q+mcT_i=mcT_f\\\\T_f=\dfrac{Q+mcT_i}{mc}\\\\=\dfrac{65000+450\times 0.447\times 20}{450\times 0.447}\\\\=343.14^{\circ} C](https://tex.z-dn.net/?f=Q%3Dmc%5CDelta%20T%5C%5C%5C%5CQ%3Dmc%28T_f-T_i%29%5C%5C%5C%5CQ%2BmcT_i%3DmcT_f%5C%5C%5C%5CT_f%3D%5Cdfrac%7BQ%2BmcT_i%7D%7Bmc%7D%5C%5C%5C%5C%3D%5Cdfrac%7B65000%2B450%5Ctimes%200.447%5Ctimes%2020%7D%7B450%5Ctimes%200.447%7D%5C%5C%5C%5C%3D343.14%5E%7B%5Ccirc%7D%20C)
So, the final temperature is
.