B) Gold has a lower activity than hydrogen and cannot replace it.
C) The reaction cannot occur because water is a reactant.
D) The reaction proceeds too slowly to create products.
2. Which of the following is the balanced form of the equation C2H6 + O2 --> CO2 + H2O?
answer choices are attached A,B,C,D top to bottom
3. The equation 2NaNO3 + CaCl2 ---> 2NaCl + Ca(NO3)2 is balanced. How many atoms of sodium (Na) are there on either side of the equation?
A) one
B) two
C) four
D) six
4. All single-displacement reactions can be classified as another type of reaction as well. What type of reaction is that?
A) combustion
B) redox
C) synthesis
D) decomposition
5. If ions change places and a gas is formed, then what type of reaction is indicated?
A) double-displacement
B) synthesis
C) decomposition
D) single-displacement
Answer:
A plasma.
Step-by-step explanation:
A plasma is a hot, ionized gas in which the atoms have lost one or more of their electrons.
Thus, the plasma consists gaseous ions as well as the electrons that were stripped from them.
The Sun's high temperatures strip the electrons from its hydrogen and helium atoms, so the Sun is essentially a giant ball of plasma.
Which letter (a-f) represents potential energy (ΔH) of the reactants?
Answer:
1) Which letter (a–f) represents potential energy (ΔH) of the products?
2) Which letter (a-f) represents potential energy (ΔH) of the activated complex?
3) Which letter (a-f) represents potential energy (ΔH) of the reactants?
Explanation:
The graph ploted represents the changes in the chemical potential (stored) energy for the reaction X + Y → Z as long as it evolves from reactants to products.
The left side of the graph shows the potential energy of the reactants, X and Y, when the reaction has not yet occurred.
Thus, the letter (a) is the potential energy of the reactants.
Moving from left to right you see that the potential energy increases, until a maximum. The maximum is when the reactants (X and y) have reacted up to an intermediate stage, in which there exists a transition state featured by an activated complex whose structure is half-way between the reactants and the products.
Thus, the letter (c) represents the potential energy of the activated complex.
At the far right of the graph, the reaction has gone to completion, the activated complex ends the transition state and the final products are formed. Thus, the letter (e) represents the potential energy of the products (Z).
All those energies are measured with respect to the same base line (the x-axis).
The attached graph has some labels added to help to identify the 3 stages: reactants, activated complex, and product.
Potential energy of products, reactants and activated complex in an energy profile diagram are displayed right end, left end and at the highest point of the diagram, respectively. However, the corresponding letters (a-f) would depend on the specific diagram.
In general, when you look at an energy profile diagram, the potential energy (ΔH) of the products is usually represented by the energy level of the products on the right side end of the diagram, which could be any of the letters a-f but depends on the specific diagram given. Similarly, potential energy (ΔH) of the reactants can be represented by the energy level of the reactants on the left end of the diagram. The potential energy (ΔH) of the activated complex, also known as the transition state, is usually the highest point on the diagram, indicating the highest energy level.
It's important to keep in mind that these are general guidelines for interpreting an energy profile diagram. The actual answer to your question (potential energy, activated complex, and reactants would depend on the specific diagram you're looking at.
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