CHEMISTRY MIDDLE SCHOOL

Calculate the number of moles in:
- 32 gram of water

Answers

Answer 1
Answer:

Answer:

hey,see the attachment
Answer 2
Answer:

Answer:

Explanation:mass in gram÷ molar mass

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Answers

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What are the two fundamental portions of an atom?​

Answers

Number of Protons in an Uncharged Atom
The two main components of an atom are the nucleus and the cloud of electrons. The nucleus contains positively charged and neutral subatomic particles, whereas the cloud of electrons contains tiny negatively charged particles.

Calculate the molarity of the solution to 3 digits. 100. g of C12H22O11 (molecular weight = 342.28 g/mole) in 1.15 liters of solvent M

Answers

Answer:

0.254 M

Explanation:

The molarity is given by the formula M: Number of Moles/ Vol (L)

Number of Moles : 100 g/342.28 g/mol = 0.292 moles

M: 0.292 moles/ 1.15 L = 0.254 M to three significant figures

What are nonexamples of mass

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 For something to have any mass as all, it has to take up space and have weight. BUT, some things don't take up any space or have weight as all...
Some things that dont have mass at all are: light, emotions, thoughts, and more...

Nonexamples of mass include concepts or entities that do not possess mass. Examples of such nonexamples are thoughts, emotions, energy, and light.

What are nonexamples of mass?

Nonexamples of mass include concepts or entities that are not considered to have physical substance or do not exhibit the property of mass. Some nonexamples of mass include ideas, emotions, time, and mathematical concepts. These entities are abstract and do not possess the physicality or measurable mass associated with material objects.

While thoughts and emotions are subjective experiences within the mind, energy and light are forms of radiation or wave-like phenomena that do not have a measurable mass component. Mass is a property associated with matter, which refers to the physical substance that occupies space and possesses inertia.

Read more about mass here: brainly.com/question/28021242

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1. Is O2 a compound? Explain.2. Is O2 a molecule? Explain.

3. State the law of conservation of matter, and give an example demonstrating its meaning.

4. Electrolysis is used to break liquid water into hydrogen and oxygen gas. If I begin with 10 grams of liquid water, will the total mass of the two gases be greater than, less than, or equal to 10? Why?

5.What kind of observations can indicate a transfer of energy has taken place in a reaction?

Answers

1. O2 is not a compound because it only contains one or more type of the same element atom.
2. O2 is a molecule because a molecule is one or more of the same element atom.
3. The law of conversion is that the mass of the system will stay the same when transfer takes place. Like if you had an equation O+H2—> H2O the mass will remain the same.

4. It will be equal to 10 because of law of conservation of matter.

5. One observation can be that the compound, reaction you’re observing, has change states.

Examples of a cell wall

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✡ Answer: A example of this is a wall surrounding fungi (a cell wall)✡


- - Why?
Because this is a good example of a cell wall, and it is commonly used in most science lessons (in  my school atleast)



✡Hope this helps✡


a gate protecting the house inside 
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