Answer:
4C + S8 ------> 4CS2
Coefficients are 4,1,4 respectively
Answer:
A substance that dissociates into ions in solution acquires the capacity to conduct electricity. Sodium, potassium, chloride, calcium, magnesium, and phosphate are examples of electrolytes.
Answer From Gauth Math
Answer:
D. -120.9 kJ
Explanation:
According to Hess's law ,the total enthalpy change for a reaction is the sum of all changes regardless of the stages or the steps of the reaction.
....(1)
![CaO + H_{2}O\rightarrow Ca(OH)_{2}\ (\Delta H = - 65 \ kJ)](https://tex.z-dn.net/?f=%3Cstrong%3ECaO%20%2B%20H_%7B2%7DO%5Crightarrow%20Ca%28OH%29_%7B2%7D%5C%20%3C%2Fstrong%3E%28%5CDelta%20H%20%3D%20-%2065%20%5C%20kJ%29)
(this reaction should be reversed in order to reach the required reaction )
On reversing the reaction the sign of
get reversed.
(In this case change sign from '-' to'+'. Hence
= + 65 kJ)
....(1)
......(2)
Adding equation (1) and (2)
![Ca(OH)_{2} + 2HCl \rightarrow CaCl_{2} + 2H_{2}O[tex][tex]Delta H = - 186 + 65 = - 121\kJ](https://tex.z-dn.net/?f=%3Cstrong%3ECa%28OH%29_%7B2%7D%20%2B%202HCl%20%5Crightarrow%20CaCl_%7B2%7D%20%2B%202H_%7B2%7DO%3C%2Fstrong%3E%5Btex%5D%3C%2Fp%3E%3Cp%3E%5Btex%5D%3Cstrong%3EDelta%20H%20%3D%20-%20186%20%2B%2065%20%3D%20-%20121%5CkJ%3C%2Fstrong%3E)
(It is nearly equal to -120.9 kJ)
Answer: 50 ml of 0.600 M of sulfuric acid will exactly neutralize the 100 ml of 0.300 M of barium hydroxide solution.
Explanation:
![H_2SO_4+Ba(OH)_2\rightarrow BaSO_4+2H_2O](https://tex.z-dn.net/?f=H_2SO_4%2BBa%28OH%29_2%5Crightarrow%20BaSO_4%2B2H_2O)
According to reaction 1 mole sulfuric acid neutralizes 1 mole oh barium hydroxide.
![M_1=0.600 M,H_2SO_4](https://tex.z-dn.net/?f=M_1%3D0.600%20M%2CH_2SO_4)
![V_1=?](https://tex.z-dn.net/?f=V_1%3D%3F)
![M_2=0.300 M,Ba(OH)_2](https://tex.z-dn.net/?f=M_2%3D0.300%20M%2CBa%28OH%29_2)
![V_2=100 ml](https://tex.z-dn.net/?f=V_2%3D100%20ml)
![M_1V_1=M_2V_2](https://tex.z-dn.net/?f=M_1V_1%3DM_2V_2)
![V_1=\frac{M_2\times V_2}{M_1}=50 ml](https://tex.z-dn.net/?f=V_1%3D%5Cfrac%7BM_2%5Ctimes%20V_2%7D%7BM_1%7D%3D50%20ml)
50 ml of 0.600 M of sulfuric acid will exactly neutralize the 100 ml of 0.300 M of barium hydroxide solution.
Answer:
A) Fission reactors release harmful gases into the atmosphere — mainly CO₂.
Explanation:
Fission reactors release no CO₂ into the atmosphere.
B, C, and D are correct.