Answer: The correct answer is true.
Explanation:
There are two types of reactions based on the heat absorbed or released:
1. Exothermic reactions: In these reactions, heat is released. The energy of the products is less than the energy of the reactants. The
for these reactions is negative.
2. Endothermic reactions: In these reactions, heat is absorbed by the reactants. The energy of the products is more than the energy of the reactants. The
for these reactions is positive.
In the given equation:
![P_4+5O_2\rightarrow P_4O_{10}+712kCal](https://tex.z-dn.net/?f=P_4%2B5O_2%5Crightarrow%20P_4O_%7B10%7D%2B712kCal)
The energy is written on the product side, which means that the heat is released in the reaction. Hence, the given equation is a exothermic reaction.
Therefore, the given statement is true.
B) Seawater. Because, it all has the same consistency. With the other choices, like vegetable soup, in one spoon full you may get a bit of potato but in another spoon full you may get a lima bean.
Answer: Volume of the balloon at this altitude is 46.9 L
Explanation:
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
![\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}](https://tex.z-dn.net/?f=%5Cfrac%7BP_1V_1%7D%7BT_1%7D%3D%5Cfrac%7BP_2V_2%7D%7BT_2%7D)
where,
= initial pressure of gas = 737 mm Hg
= final pressure of gas = 385 mm Hg
= initial volume of gas = 28.6 L
= final volume of gas = ?
= initial temperature of gas = ![26.8^oC=273+26.8=299.8K](https://tex.z-dn.net/?f=26.8%5EoC%3D273%2B26.8%3D299.8K)
= final temperature of gas = ![-16.3^oC=273-16.3=256.7K](https://tex.z-dn.net/?f=-16.3%5EoC%3D273-16.3%3D256.7K)
Now put all the given values in the above equation, we get:
![\frac{737\times 28.6}{299.8}=\frac{385\times V_2}{256.7}](https://tex.z-dn.net/?f=%5Cfrac%7B737%5Ctimes%2028.6%7D%7B299.8%7D%3D%5Cfrac%7B385%5Ctimes%20V_2%7D%7B256.7%7D)
![V_2=46.9L](https://tex.z-dn.net/?f=V_2%3D46.9L)
Thus the volume of the balloon at this altitude is 46.9 L
Answer:
The equilibrium will move in forward direction.
Explanation:
Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.
This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.
![Cr_2O_7^{2-}(aq)+H_2O(l)\rightleftharpoons 2CrO_4^{+}(aq)+2H^+(aq)](https://tex.z-dn.net/?f=Cr_2O_7%5E%7B2-%7D%28aq%29%2BH_2O%28l%29%5Crightleftharpoons%202CrO_4%5E%7B%2B%7D%28aq%29%2B2H%5E%2B%28aq%29)
On addition of base at the equilibrium, the hydroxide ions of the base will neutralize the hydrogen ions and lowering in concentration of hydrogen ion will be observed.
So, on lowering of concentration of hydrogen ions the equilibrium will move in direction in accordance to Le Chatelier’s Principle .The equilibrium will move in forward direction.
The molar concentration of a solution containing 469 grams of C6H12O6 in 82 milliliters of water is 31.7M.
<h3>HOW TO CALCULATE MOLAR CONCENTRATION:</h3>
- The molar concentration of a solution can be calculated by dividing the number of moles by its volume.
- According to this question, there are 469 grams of C6H12O6 in 82 milliliters of water.
The number of moles = 469g ÷ 180.156g/mol = 2.6mol
Volume of water in litres = 82/1000 = 0.082L
Concentration of solution = 2.6mol ÷ 0.082L = 31.71M
Therefore, the molar concentration of a solution containing 469 grams of C6H12O6 in 82 milliliters of water is 31.7M.
Learn more about concentration at: brainly.com/question/202460