Answer:
3Fe2O2---> Fe3O4
Explanation:
You need to add three to the left side to make it equal to the one on the right, and add a 2 since you can't change the subscripts
Answer:
It changes into a liquid because when it gets heated up to a certain temperature, it reaches it's "boiling point", which is when it will start to transform into a liquid because the temperature is too hot for it to remain a solid.
Explanation:
Just think of when icicles melt because of the sun. The sun is heating them up and it gets too warm to the point that it liquidizes.
The balanced chemical reaction is written as:
2K + F2 = 2KF
We are given the amount of potassium to be used in the reaction. THis will be the starting point. We do as follows:
23.5 g K ( 1 mol / 39.10 g) (1 mol F2 / 2 mol K ) ( 22.4 L / 1 mol ) = 6.73 L F2 gas needed
Answer: The specific heat of the metal in 
Explanation:
As we know that,
![m_1\times c\times (T_{final}-T_1)=-[m_2\times c\times (T_{final}-T_2)]](https://tex.z-dn.net/?f=m_1%5Ctimes%20c%5Ctimes%20%28T_%7Bfinal%7D-T_1%29%3D-%5Bm_2%5Ctimes%20c%5Ctimes%20%28T_%7Bfinal%7D-T_2%29%5D)
where,
= mass of metal = 31.7 g
= mass of water = 100.0 g
= final temperature = 
= temperature of metal = 
= temperature of water = 
= specific heat of metal= ?
= specific heat of water = 
Now put all the given values in equation (1), we get
![m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]](https://tex.z-dn.net/?f=m_1%5Ctimes%20c_1%5Ctimes%20%28T_%7Bfinal%7D-T_1%29%3D-%5Bm_2%5Ctimes%20c_2%5Ctimes%20%28T_%7Bfinal%7D-T_2%29%5D)
![-(31.7\times c_1\times (24.6-96.5)^0C)=(100.0\times 4.184\times (24.6-17.3)]](https://tex.z-dn.net/?f=-%2831.7%5Ctimes%20c_1%5Ctimes%20%2824.6-96.5%29%5E0C%29%3D%28100.0%5Ctimes%204.184%5Ctimes%20%2824.6-17.3%29%5D)
Therefore, the specific heat of the metal in
