If Mr. Kirwan’s pet Fluffy the Wonder Hamster rides his unicycle at a rate of 5m/s to thenorth on a flatbed train car. Under what conditions do you see him moving at 5 m/s?

Answer: a) Balancing chemical equations

Explanation:

     We are given that this student is struggling to have the "equations balanced to cancel out." This means that answer option A gives the specific problem they are facing, a) Balancing chemical equations. While they may be struggling to cancel things out, they say "I can't seem to have the equations balanced." This leads us to the specific answer.

Final answer:

The application of Hess's law involves balancing reactions and using stoichiometry to add or subtract equations, thus obtaining a desired reaction. The law states that the enthalpy change for a total process is the sum of enthalpy changes for individual steps. One can think of complex reactions as occurring in individual steps, helping to balance or cancel out equations.

Explanation:

In your question, you're grappling with the utilization of Hess's law and balancing or canceling out equations. To solve such problems with Hess's law, it's crucial first to understand what this law implies. Hess's law states that if a chemical process can be written as the sum of multiple steps, the enthalpy change of the total process equals the sum of the enthalpy changes for individual steps. This law works because enthalpy is a state function, which means that enthalpy changes depend mainly on the initial and final state, not the path through which the process passed.

For example, take the reaction of carbon with oxygen to form carbon dioxide. You can write this reaction as a direct process: C(s) + O₂(g) = CO₂(g). But you can also divide it into two steps: 1. Carbon and oxygen form carbon monoxide (C(s) + 02 (8) -> CO(g)), and 2. Carbon monoxide reacts with oxygen to form carbon dioxide (CO(g) + 1-0₂ (8) -> CO₂(g)). The reaction, when written as a sum of these steps, will give you the overall reaction, helping to balance or cancel out the equations.

The challenging aspect of Hess's law is the manipulation of equations to achieve cancellation and balance. Remember, stoichiometry rules allow us to change the quantities of reactants and products (but not their identity) when we have balanced equations. It's akin to mathematical equations, where one can multiply an entire equation by a constant to obtain an equivalent equation.

Learn more about Hess's Law here:

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Answer;

• Liquids have the ability to change shape.
• Liquids flow, even with some resistance.
• Liquids have definite volume
• Liquids have molecules that slip past each other.

Explanation;

• Liquids are one of the three states of matter, others being solids and gases.
• Liquids are characterized by particles that are apart as compared to solid particles which are very closely packed, however they are still in contact unlike the case of gaseous particles.
• Liquids have a definite volume but an indefinite shape, thus they occupy the volume of the container they are put.
• Additionally, they are capable of flowing and take any shape. This is due to the presence of inter-molecular forces which allow the molecules to slide past each other freely.

answer:

liquids have he ability to change shape

liquids flow even with some resistance

liquids have a definite volume

liquids have molecules that slip past each other