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Mariana [72]
3 years ago
14

What energy is a quarterback’s arm before throwing a pass

Chemistry
2 answers:
Slav-nsk [51]3 years ago
5 0

Answer:

Potential Energy

Explanation:

Potential energy is the energy available when a body is at a state of rest or in virtue of its position. Its formula is mgh.

The quarter back’s hasn’t thrown the ball yet even though it has the potential to do so later on which makes it possess

Potential energy.

As soon as the arm moves and the ball is thrown, the potential energy is converted to Kinetic energy . The kinetic energy is the energy available as a result of the motion(movement) of a body.

Lunna [17]3 years ago
3 0

Potential energy


Reason why: because the quarterbacks arm has the potential to throw a ball but since it is not throwing the ball, the energy is being held... this holding of energy is called potential energy

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Suppose 6.63g of zinc bromide is dissolved in 100.mL of a 0.60 M aqueous solution of potassium carbonate. Calculate the final mo
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[Zn²⁺] = 4.78x10⁻¹⁰M

Explanation:

Based on the reaction:

ZnBr₂(aq) + K₂CO₃(aq) → ZnCO₃(s) + 2KBr(aq)

The zinc added produce the insoluble ZnCO₃ with Ksp = 1.46x10⁻¹⁰:

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<em>Moles ZnB₂ (Molar mass: 225.2g/mol) = Moles Zn²⁺:</em>

6.63g ZnBr₂ * (1mol / 225.2g) = 0.02944moles Zn²⁺

<em>Moles K₂CO₃ = Moles CO₃²⁻:</em>

0.100L * (0.60mol/L) = 0.060 moles CO₃²⁻

Moles CO₃²⁻ in excess: 0.0600moles CO₃²⁻ - 0.02944moles =

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1.46x10⁻¹⁰ = [Zn²⁺] [0.3056M]

<h3>[Zn²⁺] = 4.78x10⁻¹⁰M</h3>

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