CHEMISTRY MIDDLE SCHOOL

1. Which one of the following statements is CORRECT?a. When heat is transferred from the surroundings to the system, q is negative.
b. Heat is transferred from the system to the surroundings in an endothermic
process.
c. The SI unit of specific heat capacity is calories per gram (cal/g).
d. Specific heat capacity is a positive value for liquids and a negative value for
solids.
e. The larger the heat capacity of an object, the more energy it takes it is to
cause a ten degree increase in temperature,

Answers

Answer 1
Answer:

Answer:

I think d is correct answer

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I need help please on these questions, i can not do the model, so please help me, if you could give me an example that would be great 1. Which of the stages of the water cycle were you able to observe in your model?2. What is the energy source in your model and what does it represent?3. Did you observe evapotranspiration in your model? If yes, where? If no, howcould you have demonstrated it?4. Where in your model does condensation occur more rapidly? How do you know?5. Do you think your model accurately demonstrates the water cycle? Why or whynot? If you were to redesign your model, how would you refine it?5 point for each.
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Answers

As both size and weight of an object increase, so will the amount of friction. The bigger size an object is, the more surface area it will have, and the heavier an object is, the more pressure it will place on something else. Both these factors lead to increased friction.

What is a solid formed from liquid reactants during chemical reaction

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In terms of ion charges and chemical change, what is the difference between CuF(s) and CuF2(s)??

Answers

In terms of ion charges and chemical change, CuF ha +1 charge and CuF₂ has +2 charge. This is the difference between CuF(s) and CuF2(s).

What are ions ?

An atom or molecule with a net electrical charge is known as an ion. Conventionally, the charge of an electron is thought to be negative; this charge is equal to and opposite to the charge of a proton, which is thought to be positive.

As stability depends on the hydration energy of the ions when they connect to the water molecules, Cu2+ is more stable than Cu+. Because the Cu2+ ion makes significantly stronger bonds and has a higher charge density than the Cu+ ion, it releases more energy.

Copper(I) ion is created when copper provides one electron to another atom; this accounts for the +1. Copper has one fewer electron than protons. Copper(II).

Thus, In terms of ion charges and chemical change, CuF ha +1 charge and CuF₂ has +2 charge.

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Copper (Cu) can have two ion charges: +1 and +2. CuF2 is with the +2 charge, copper (II), and CuF is the opposite. 

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Answers

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Jason thinks that global climate change is not happening, because a city in northern Florida received snow one day in January. Which statement explains what is wrong with Jason's reasoning. A) Jason has confused the weather for one day with the climate of a region.

B) Northern Florida would need snow for at least a week for this to be true.

C) The climate of northern Florida would be unaffected since it is already warm in Florida.

D) Jason does not realize that Southern Florida would also need to receive snow to make this true.

Answers

Final answer:

Jason is mistaken in equating a one-time weather event, such as snow in northern Florida, with climate change. Weather is short-term and local, whereas climate represents long-term regional patterns. An isolated weather occurrence does not contradict the extensive evidence of global climate change.

Explanation:

Jason has confused a singular weather event with the overall climate in his reasoning. The correct statement that explains what is wrong with Jason's reasoning is:

A) Jason has confused the weather for one day with the climate of a region.

Weather refers to short-term atmospheric conditions in a specific area, such as a snowy day in northern Florida. Climate, on the other hand, is the average weather in a region over a long period, typically taken over 30 years. A single instance of snow in a typically warm region does not refute the evidence of global climate change. It's the long-term trends and patterns, not isolated incidents, that indicate climate change. Therefore, the occurrence of snow in northern Florida is simply an irregular weather event and not an indicator of the overall climate or a disproof of global climate change.

Learn more about Weather vs. Climate here:

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Answer: C

Explanation:
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