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Tomtit [17]
3 years ago
8

A negative ΔH means an exothermic reaction. True False

Chemistry
1 answer:
slega [8]3 years ago
7 0
True a negative change in enthalpy means an exothermic reaction
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An element with the smallest anionic (negative-ionic) radius would be found on the periodic table in
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3 years ago
What is the name of the ability to use up energy in one second
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Answer:

Work

Explanation:

Work is defined as the ability to use energy in one second and its SI unit is same as energy that is joule.

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3 years ago
If 12.4 mol of Ne gas occupies 122.8 L, how many mol of Ne would occupy 339.2 L under the same temperature and pressure? Record
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Answer:

3.43×10¹ mol

Explanation:

Given data:

Initial number of  moles = 12.4 mol

Initial volume = 122.8 L

Final number of moles = ?

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Solution:

The number of moles and volume are directly proportional to each other at same temperature and pressure.

V₁/n₁  =  V₂/n₂

122.8 L/ 12.4 mol  =  339.2 L / n₂

n₂ = 339.2 L× 12.4 mol  / 122.8 L

n₂ = 4206.08 L.mol /122.8 L

n₂ = 34.3mol

In scientific notation:

3.43×10¹ mol

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3 years ago
Identify each of the following as a representative element or a transition element:
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The correct answer is B. Platinum is the transition element among the choices. The elements belonging to this group are those having a partially filled d or f subshell. It usually refers to the d-block transition elements of the periodic table.
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