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3 years ago

Oxidation-reduction reactions occur because of the competition between particles for

1 answer:

5 0

Answer:
<span>Oxidation-reduction reactions occur because of the competition between particles for <u>Electrons</u>.

Explanation:
Oxidation is defined as the loss of electrons. While, Reduction is defined as the gain of electrons. We also know that oxidation and reduction reaction happens simultaneously. Therefore, the electrons lost by one element are gained by another element.

Example:
2 Fe + O</span>₂ → 2 FeO

In above reaction the competition for electrons is found between Oxygen and Iron.

Oxidation of Iron:

2 Fe → 2 Fe²⁺ + 4 e⁻

Reduction of Oxygen:

O₂ + 4 e⁻ → 2 O²⁻

Hence, in above reaction oxygen wins the competition by gaining the electrons from Iron.

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Why is it important for scientists to review and repeat the work of other scientists?

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To confirm the results of the same experiment to see if they are similar

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4 years ago

Read 2 more answers

Confused on what to do? Can someone explain this in a simple way?

aev [14]

Introduction of essay: talk about the three models used in science (mathematical, conceptual and physical), how do they help scientists understand complex ideas?, introduce the formula for density (as a mathematical model) and the particle model (as a conceptual model ... i think it is...) in science.

Body paragraph of essay: further discuss the properties of the models, link them to the examples (formula of density and the particle model) and compare and contrast (the strengths and weaknesses of each model) e.g. “Mathematical models help scientists to understand the underlying relationship between two concepts. Although a mathematical model is short and concise it is often hard to describe the model conceptually or physically and its therefore harder to get the full picture of how a scientific process works physically. A conceptual model is helpful for intuitive ideas in science like the particle model that would be harder to describe mathematically, due to how broad it is.” Etc etc.

Conclusion paragraph of the essay: “to conclude, models in science are important because they help us to understand difficult and intuitive ideas in a more clear and concise manner.” Etc etc.

Hope this helped - keep in mind that i don’t know the actual difference between conceptual and physical models so look through your books notes for more info for your essay.

6 0

3 years ago

What is the molar concentration of 250. mL of aqueous solution containing 48.8 g of glucose, C6H12O6?

Nezavi [6.7K]

Answer:

1.08 mol/L

Explanation:

Molarity -

Molarity of a substance , is the number of moles present in a liter of solution .

$M=\frac{n}{V}$

M = molarity ( unit = mol / L or M )

V = volume of solution in liter ( unit = L ),

n = moles of solute ( unit = mol ),

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

$n=\frac{w}{m}$

n = moles ,

w = given mass ,

m = molecular mass .

From the information of the question ,

V = 250 mL

Since ,

1 mL = 1/1000L

V = 0.250 L

w = 48.8 g

As we known , the mass of glucose ,

m = 180g/mol ,

From the above formula , moles is given as ,

$n=\frac{w}{m}$

substituting the corresponding values ,

n = 48.8g / 180g/mol

n = 0.27 mol

Now , the molarity can be calculated by using the above equation ,

M = n / V

substituting the corresponding values ,

M = 0.27 mol / 0.250 L

M = 1.08 mol/L

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4 years ago

Describe the basic particle from which all elements are made

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Nucleus: contains protons and neutrons
electron cloud: surrounds the necules and contains the electrons

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Protons- positively charged
Neutrons- no charge

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3 years ago