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hichkok12 [17]
3 years ago
11

Which statement about atoms and molecules is

Chemistry
2 answers:
Pavel [41]3 years ago
8 0

Elements always exist as pair of atoms called molecules .

Explanation:-

  • The material which has only one types of similar atoms called element .
  • Ex:-Sodium,Carbon etc
zhuklara [117]3 years ago
3 0

Answer:

Elements always exists as pairs of atoms called molecules

Explanation:

  • Elements are simply substances in its pure form.
  • The atom of an element is simply referring to a single element. eg we have sodium atom as Na, it appears singly and in its pure form
  • A molecule then refers to when an atom of the same element is paired up. i.e not in a single state. eg, we have one atom of hydrogen molecule as H2, Oxygen molecule as O2.
  • Note. the molecular elements appear in pairs while the atomic elements appear singly.

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Answer:

-30.7 kj/mol

Explanation:

The standard free energy for the given reaction that is the hydrolysis of ATP is calculated using the formula:  ∆Go ’= -RTln K’eq

where,  

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T = 298 K

For reaction,

1. K′eq1=270,

∆Go ’= -RTln K’eq

= - 8.315 x 298 x ln 270

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= - 13.85 kj/mol

2. K′eq2=890

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Thus, -30.7 kj/mol is the correct answer.

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3 years ago
Identify what type of reaction is below. Also determine what coefficients that would balance the chemical equation.
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Answer:

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I hope it's helps you

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Which element is a liquid at STP?<br> (1) bromine (3) francium<br> (2) cesium (4) iodine
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Given what we know, the ability of water to absorb more heat than the other substances mentioned is a reflection of its high boiling point.

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This is the temperature at which the substance boils, and subsequently evaporates. Having a higher boiling point means that the substance will be able to absorb much more heat than that of a substance with a lower boiling point.

Therefore, Water molecules have a higher boiling point than molecules of similar size, such as ammonia and methane, reflecting its capacity to absorb large amounts of heat.

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