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3 years ago

10

The diagram below shows the structural formula and 3D model of the same substance. Which substance is represented by the diagram

above?
A. H2O
B. OH
C. H2O2
D. OH2

PLZ HELP ASAP

1 answer:

Agata [3.3K]3 years ago

4 0

I feel like its C but mmmm idk

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Can someone solve this problem and explain to me how you got it

Zarrin [17]

1) The electric force changes by a factor of 25

2) The electric force changes by a factor of 16/9

Explanation:

1)

The magnitude of the electrostatic force between two charges is given by Coulomb's law:

$F=k\frac{q_1 q_2}{r^2}$

where:

$k=8.99\cdot 10^9 Nm^{-2}C^{-2}$ is the Coulomb's constant

$q_1, q_2$ are the two charges

r is the separation between the two charges

In this problem, let's call F the initial force between the two charges when they are at a distance of r.

Later, the distance is changed by a factor of 5. Let's assume it has been increased to a factor of 5: so the new distance is

r' = 5r

Therefore, the new force between the charges is:

$F' = k' \frac{q_1 q_2}{r'^2}=k' \frac{q_1 q_2}{(5r)^2}=\frac{1}{25}(k' \frac{q_1 q_2}{r'^2})=\frac{F}{25}$

So, the force has changed by a factor of 25.

2)

The original force between the two charges is

$F=k\frac{q_1 q_2}{r^2}$

In this problem, we have:

- The distance between the charges is changed by a factor of 6:

r' = 6r

- The charges are both changed by a factor of 8:

$q_1' = 8q_1$

$q_2' = 8q_2$

Substituting into the equation, we find the new force:

$F' = k' \frac{q_1' q_2'}{r'^2}=k' \frac{(8q_1) (8q_2)}{(6r)^2}=\frac{64}{36}(k' \frac{q_1 q_2}{r'^2})=\frac{16}{9}F$

So, the force has changed by a factor of 16/9.

Learn more about electric force:

brainly.com/question/8960054

brainly.com/question/4273177

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Dmitri Mendeleev- arranged elements according to their

atomic mass

Johann Wolfgang Dobereiner-created groups of three elements,

each based on similar properties

John Newlands-used patterns to predict undiscovered

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Antoine Lavoisier-divided elements into four categories

Explanation:

The periodic table or the table depicting the arrangement of various elements has a long history. Several of the scientist starting from Lavoisier to Mendeleev contributed to the table in their might. The present table has been an evolution of the previous tables over their shortcomings.

Some of the notable contributions include-

Mendeleev- Mendeleev arranged the elements in order of atomic mass rather than atomic mass. Through this, he also discovered new elements.

Newlands- He formulated the Newland law of octaves similar to musical notation.

Lavoisier- Lavoisier divided the elements into various categories and also defined elements.

Dobereiner- He formulated the triad law which encapsulated that certain group of elements showed similar properties, hence can be grouped together.

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