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Klio2033 [76]
3 years ago
5

What is the potential energy of a 2,000-kg car parked at the top of a 30-m hill?

Chemistry
2 answers:
omeli [17]3 years ago
8 0

Answer:

588,000 J APEX Verified

Explanation:

Soloha48 [4]3 years ago
4 0
The potential energy of an object is the energy stored in an object related to its position.
Potential energy can be calculated as follows ;
P.E = m.g.h
Where M - mass of object
G - gravitational acceleration-9.8 m/s2
H - height from the ground
Substituting the equations
P.E = 2000 kg x 9.8 m/s2 x 30 m
P.E = 588 kJ
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What is the identity of a metal that has a mass of 27.0 g and a volume of 10.0 cm3?
dexar [7]

The identity of a metal that has a mass of 27.0g and a volume of 10.0cm is Aluminium. That is option B.

<h3>What is molar mass?</h3>

Molar mass is defined as the mass in grams of one mole of an element. This is measured in grams/mole of that substance.

The metal that is 27.0 g and a volume of 10.0 cm3 is aluminium because aluminium is 27 times heavier than 1/12th of the mass of carbon-12 atom.

Therefore, the identity of a metal that has a mass of 27.0g and a volume of 10.0cm is Aluminium.

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2 years ago
5. In general, how are word equations written to describe chemical reactions?
Len [333]

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For example, balanced chemical reaction for cellular respiration (convert biochemical energy):  

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O or:

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Glucose and oxygen are reactants and carbon dioxide and water are products of reaction.

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8 0
3 years ago
The pressure inside a compressed gas cylinder is 144 atm at 48°C. What will the pressure inside the cylinder be after it is cool
Andrews [41]
<h3>Answer:</h3>

134 atm

<h3>Explanation:</h3>
  • Based on the pressure law, the pressure of a gas varies directly proportionally to the absolute temperature at a constant volume.
  • Therefore; we are going to use the equation;

\frac{P1}{T1}=\frac{P2}{T2}

In this case;

Initial pressure, P1 = 144 atm

Initial temperature, T1 (48°C) = 321 K

Final temperature, T2 (25°C) = 298 K

We need to find the final pressure,

Therefore;

P2 = (P1/T1)T2

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Therefore, the new pressure will be 134 atm.

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4 years ago
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Rina8888 [55]

Answer:

Explanation:

To break apart a molecule of H2So4 is much higher than HCl although HCl is an ionic bond it is only bonded to one hydrogen. While H2So4 is bonded to two of them, aswell as its structure being much more complex. The energy to break Ba(h)2 is equal in both.

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