What type of reaction takes place when atoms or molecules rearrange to form new substances?

Answer : The correct option is, (3) 750 K and 20 kPa

Explanation :

The conditions for ideal gas are :

Ideal gas are those gas that has no intermolecular attractions.

Ideal gas are those gas that have negligible volume.

The ideal gas equation is,

The conditions for real gas are :

Real gas are those gas that have intermolecular attractions.

Real gas are those gas that have volume.

The real gas equation is,

A real gas behave ideally at high temperature and low pressure condition.

From the given options, option (3) have high temperature and low pressure is the correct option.

Hence, at 750 K and 20 kPa conditions of temperature and pressure does a sample of helium behave most like an ideal gas.

Answer: The enthalpy of reaction is, -206.18 kJ

Explanation:-

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

The final reaction is

The intermediate balanced chemical reaction will be,

(1)    

(2)    

(3)    

Now adding (2) and (3) and subtracting (1) , we get :

Therefore, the enthalpy of reaction is, -206.18 kJ

Final answer:

To calculate the ΔHreaction for the given reaction using Hess's Law, we need to manipulate the given equations and sum up the ΔH values. After manipulating the equations and summing up the ΔH values, the ΔHreaction is -280.03 kJ.

Explanation:

To calculate the ΔHreaction for the given reaction, we can use Hess's Law. We need to manipulate the given equations to match the overall reaction. Since the overall reaction involves CO, H2, CH4, and H2O, we can use the given equations as follows:

1. Reverse the equation for CO(g) + O2(g) → CO(g) to get CO(g) → C(s) + O2(g).
2. Double the equation for C(s) + 2H2(g) → CH4(g) to get 2C(s) + 4H2(g) → 2CH4(g).
3. Leave the equation for H2(g) + O2(g) → H2O(g) as is.

Add up the manipulated equations and their respective ΔH values:

• CO(g) → C(s) + O2(g) (ΔH = 110.5 kJ)
• 2C(s) + 4H2(g) → 2CH4(g) (ΔH = -2 * 74.85 kJ = -149.7 kJ)
• H2(g) + O2(g) → H2O(g) (ΔH = -241.83 kJ)

Now, sum up the ΔH values:

110.5 kJ + (-149.7 kJ) + (-241.83 kJ) = -280.03 kJ

Therefore, the ΔHreaction for the reaction CO(g) + 3H2(g) → CH4(g) + H2O(g) is -280.03 kJ.

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Answer:

Explanation:The buffer is a mixture of ammonia (NH3) and ammonium (NH4+). ... Since ammonia (NH3) is a weak base, it will have a pH above 7 and since ammonium (NH4+) is a weak acid, it will have a pH below 7. Ammonia (NH3) is a weak base and ammonium (NH4+) is a weak acid. Ammonia (NH3) is the conjugate base of ammonium (NH4+).

Final answer:

Ammonium ion, in collaboration with ammonia, acts as a buffer solution. The point at which it becomes a buffer is when the concentrations of NH3 and NH4+ are equal, typically around a pH of 9.25, enabling them to neutralize other strong acids or bases to stabilize the pH.

Explanation:

Ammonium ions (NH4+) act as a buffer solution in conjunction with a weak base (ammonia, NH3). This system can balance the pH of a solution by either absorbing excess hydronium ions (H3O+) when the solution becomes too acidic or by producing more when the solution becomes too basic. The point at which the ammonium ion acts as a buffer solution is the pH at which the concentrations of the weak base (NH3) and its conjugate acid (NH4+) are equal. This is typically around a pH of 9.25, where the ammonium ion and its conjugate base, ammonia, can effectively neutralize additional strong acids or bases, thereby stabilizing the pH of the solution.

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When the number of electron and number of protons are equal in the atom then the atom is said to be an electrically neutral atom. The loss of electron will result in the formation of cation and the atom will possess positive charge which is equal to the number of electrons lost whereas the gain of electron will result in the formation of anion and the atom will possess negative charge which is equal to the number of electrons gained.

The electrically neutral atom have 0 charge as the number of protons and electrons are equal.

For electrically neutral atom of hydrogen, the number of electron =1 and the number of proton = 1.

Hence,  the charge on an electrically neutral atom of hydrogen is 0.

Its B zero because its neutral meaning that there balance

The correct answer is C. The liver and gallbladder.

Explanation

The liver, is an organ of the digestive system, is the most voluminous in the human body, and performs three vital functions essential for the organism: Detoxification in which it acts as a filter that collects and eliminates numerous toxins; the liver metabolizes carbohydrates, fats, lipids and proteins, secreting bile, an essential element for our digestion. Also, it prevents bleeding through a coagulation process; finally, works as a container for vitamins and glycogen, carbohydrates, and energy is stored in the form of sugar. On the other hand, the gallbladder is an organ of the digestive system, whose function is to store and concentrate the bile secreted by the liver required by the digestion process. The gallbladder stores bile until a stimulus caused by food intake, especially meat or fat. According to the above, if the functions of these two organs are impaired, the most likely is that the person will have trouble digesting fats. So, the correct answer is C. The liver and gallbladder.

C

came from edginuity