CHEMISTRY HIGH SCHOOL

Is standing at the top of a slide potential or kinetic energy?

Answers

Answer 1
Answer: Potential energy kinetic is the actual movement

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71. The density of osmium (the densest metal) is 22.57 g/cm². If a1.00-kg rectangular block of osmium has two dimensions of
4.00 cm x 4.00 cm, calculate the third dimension of the block.

Answers

Answer:

y = 2.77 cm

Answer: The third dimension is 2.77 cm

Final answer:

The question deals with density in physics, specifically regarding the densest metal, osmium. The dimensions of an osmium block are partially given, and the task is to find the third dimension. However, without the mass of the block, it is impossible to give a complete solution.

Explanation:

The subject of the question involves understanding the concept of density, which is the mass of an object divided by its volume. The density of osmium is given as 22.57 g/cm³. The student is also given the dimensions of the osmium block, which forms a rectangular prism with known length and width (4.00 cm x 4.00 cm), but unknown height. D = m/v or v = m/D can be used to find the third dimension of the block (height).

However, to use this formula to get a complete solution, the mass of the block must be known, which is not provided in the question. Without this crucial information, we can't solve this problem correctly.

Learn more about Density here:

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Which statement explains why the bonds between nonmetals tend to be covalent? The bonds are found to be nondirectional. They have large differences in electronegativity. They have small differences in electronegativity. They have ions that produce an electrostatic pull.

Answers

Correct Answer: They have small differences in electronegativity (statement 3)
Reason: 
The nature of chemical bond between atoms is primarily driven by the electronegativity  difference between constituent atoms. If electronegativity difference between constituent atoms is significantly higher, ionic bond formation is preferred. On other hand, low difference in electronegativity values, favours formation of covalent bond. 

Which statement explains why increasing thetemperature increases the rate of a chemical
reaction, while other conditions remain the same?
(1) The reacting particles have less energy and
collide less frequently.
(2) The reacting particles have less energy and
collide more frequently.
(3) The reacting particles have more energy and
collide less frequently.
(4) The reacting particles have more energy and
collide more frequently.

Answers

The answer is (4) the particles have more energy and collide more frequently.

It's urgent. I need help to know the oxidation numbers and what is the oxidation and reduction part of this equation Fe + H2SO4= Fe2(SO4)3 + H2

Answers

In the given equation: Fe + H2SO4 = Fe2(SO4)3 + H2

To determine the oxidation numbers, we assign oxidation numbers to each element in the equation.

1. Fe: The oxidation number of Fe is 0 since it is in its elemental form.

2. H2SO4:
- H has an oxidation number of +1.
- S has an oxidation number of +6 since it is in the sulfate ion (SO4)2-.
- O has an oxidation number of -2.

3. Fe2(SO4)3:
- Fe has an oxidation number of +3 since it is in the Fe2+ ion.
- S has an oxidation number of +6 since it is in the sulfate ion (SO4)2-.
- O has an oxidation number of -2.

4. H2:
- H has an oxidation number of 0 since it is in its elemental form.

Now, let's analyze the oxidation and reduction parts of the equation:

Oxidation: Fe is oxidized from an oxidation number of 0 to +3 in Fe2(SO4)3.

Reduction: H2SO4 is reduced. The sulfur (S) in H2SO4 goes from an oxidation number of +6 to +4 in Fe2(SO4)3, and the hydrogen (H) in H2SO4 goes from an oxidation number of +1 to 0 in H2.

Overall, in this equation, Fe is oxidized, and H2SO4 is reduced.

Another source of energy is nuclear energy. Nuclear energy is the energy in the nucleus of an atom. We can release this energy and use it to make electricity. In this project, you will research nuclear energy.OBJECTIVES
Research nuclear energy and its use for generating electricity.

Directions
Use the library, internet, and other educational resources to research nuclear energy.
Write a three-paragraph report on what you have learned. Be sure to include the uses of nuclear power, how it is generated, and the impact it has on the environment. Also, answer the question, "Is nuclear energy renewable?"

Answers

Yes.Nuclear energy is renewable

What are 5 examples of gases found at home?

Answers

Examples of gases that can be found at home include carbon monoxide, chlorine, ammonia, hydrogen, nitrogen, and sulfur oxides.

  • Gas is one of the three states of matter that we've. A gas simply means a substance that doesn't have a fixed shape and fixed volume.

  • It should also be noted that gases have lower density when compared to solid or liquid. There are different gases such as oxygen, nitrogen, helium, carbon monoxide, etc.

  • Examples of gases found at home include carbon monoxide, chlorine, ammonia, hydrogen, nitrogen, and sulfur oxides.

In conclusion, carbon monoxide is gotten when we burn wood, charcoal, fuel, etc.

Read related link on:.

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1. Water vapour

2. Steam

3. A fart

4. Dry ice

5. Smoke
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