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murzikaleks [220]
3 years ago
6

Eddie and val observed the picture of an athlete running in a race. eddie stated the picture shows potential energy being transf

ormed to kinetic energy. val stated that it shows chemical energy being transformed to mechanical energy. which best explains who is correct?
a) only eddie is correct because the picture does not show a transformation that starts with chemical energy.
b) only eddie is correct because the picture does not show a transformation that ends with mechanical energy.
c) both eddie and val are correct because chemical energy is a type of potential energy and mechanical energy includes kinetic energy.
d) both eddie and val are correct because chemical energy is a type of kinetic energy and mechanical energy includes potential energy.
Chemistry
2 answers:
Lelu [443]3 years ago
5 0

Answer:

C. Both Eddie and Val are correct because chemical energy is a type of potential energy and mechanical energy includes kinetic energy.

lidiya [134]3 years ago
3 0

C. Both Eddie and Val are correct because chemical energy is a type of potential energy and mechanical energy includes kinetic energy.

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Which best characterizes a crystal
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<h3><u>Answer;</u></h3>

A dense substance that is hard and incompressible

<h3><u>Explanation</u>;</h3>
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A gaseous mixture consisting of nitrogen, argon, and oxygen is in a 3.5-L vessel at 25C. Determine the number of moles of oxygen
Step2247 [10]

Answer:

Number of moles of oxygen = 0.037  mol

Explanation:

Given data:

Total pressure = 98.5 KPa

Partial pressure of nitrogen = 22.0 KPa

Partial pressure of argon = 50.0 KPa

Volume = 3.5 L

Temperature = 25°C (25+273= 298K)

Number of moles of oxygen = ?

Solution:

Total pressure = P(N₂) + P(O₂) + P(Ar)

98.5 KPa = 22.0 KPa +P(O₂) + 50.0 KPa

98.5 KPa = 72.0 KPa +P(O₂)

P(O₂)  = 98.5 KPa - 72.0 KPa

P(O₂)  = 26.5 KPa

KPa to atm:

26.5 KPa/ 101 = 0.262 atm

Number of moles of oxygen:

PV = nRT

n = PV/RT

n = 0.262 atm × 3.5 L / 0.0821 atm.L/mol.K  × 298 K

n = 0.917atm.L /24.47atm.L/ mol

n = 0.037  mol

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3 years ago
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