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lozanna [386]
3 years ago
6

what is a diagram showing the forces acting on a coasting bike rider traveling at 25 km/h on a flat roadway

Chemistry
2 answers:
Anna35 [415]3 years ago
6 0
They are in the red.
Nat2105 [25]3 years ago
4 0

The forces are in red. <span> </span>
https://us-static.z-dn.net/files/d99/dbb915db7d81699373f26b693db1424c.png

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Calculate the whole-number ratio of staggered to eclipsed conformers that are present at room temperature. Use the Actual G˚ bar
natka813 [3]

Answer:

The ratio of staggered to eclipsed conformers is 134

Explanation:

It is possible to determine the ratio of staggered to eclipsed conformers of a reactant, using the equilibrium:

Staggered ⇄ Eclipsed

Keq = [Eclipsed] / [Staggered]

That means Keq is equal to the ratio we need to find:

Using:

G˚= -RTln Keq

<em>Where G° = -12133.6J/mol</em>

<em>R is gas constant: 8.314J/molK</em>

<em>T is absolute temperature: 298K</em>

<em />

-12133.6J/mol= -8.314J/molK*298K ln Keq

4.8974 = ln Keq

134 = Keq = [Eclipsed] / [Staggered]

<h3>The ratio of staggered to eclipsed conformers is 134</h3>
3 0
2 years ago
When is buying a house better than renting
tester [92]
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5 0
3 years ago
Which of the following processes is exothermic?
Elodia [21]

Answer:

a. The reaction associated with DHºf for an ionic compound

Explanation:

An exothermic process is a process that loses heat for the surroundings, so the temperature of the system must decrease, and ΔH must be negative.

DHºf or ΔHºf of an ionic compound is always negative because the final energy is always lower than the initial. It happens because of the stability of the bond, the system wants a lower energy state to be stable.

The ionization of a lithium atom occurs with the gain of energy, which is given to the electron, so it may give off the atom. So it's an endothermic process.

To change the state of a solid to a gas (sublimation), the compound must gain heat, its temperature must increase, so it's always an endothermic process.

To break a covalent bond it's necessary the gain of energy, so it's an endothermic process.

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tatuchka [14]
The answer is <span>C. those with the same color</span>
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3 years ago
Which particle is emitted when an atom of 85Kr spontaneously decays?
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