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morpeh [17]
3 years ago
5

The standard enthalpy of formation of Ca2+ (g) (∆H = 1934 kJ/mol)

Chemistry
1 answer:
Alex73 [517]3 years ago
6 0

Answer:

see explanation

Explanation:

The process of ionization to produce cations is endothermic. For formation of Ca⁺² two ionization steps need be illustrated as follows...

1st ionization step: Ca° + 590Kj => Ca⁺ + e⁻

2nd ionization step: Ca⁺ + 1151Kj => Ca⁺² + e⁻

__________________________________-

Net Ionization Rxn: Ca° + 1741Kj => Ca⁺² + 2e⁻

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kumpel [21]

if you have 1mol of NO. how many molecules of NO are there

Answer:

6.02 x 10²³ molecules

Explanation:

Given parameters:

Number of moles of NO = 1 mole

Unknown:

Number of molecules in NO;

Solution:

A mole of compound contains the Avogadro's number of particles.

  1 mole of a substance contains 6.02 x 10²³ molecules

So, 1 mole of NO contained 6.02 x 10²³ molecules

3 0
3 years ago
What are the things to consider in classifying the different kinds of mixture?
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Whether the mixture can be separated

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1) 61.8%

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3 0
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olga nikolaevna [1]

Answer and Explanation:

DIFFERENCE BETWEEN ELEMENT AND COMPOUND :

  • An element is made up of same type of atoms whereas a compound is made up of different type of atoms.
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3 0
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Heat will flow from a hot object to a cold object until the objects reach A. stability. B. boiling point. C. collapse. D. equili
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The thermal energy will flow from the hotter object to the cooler object until their temperatures are equal i.e. until they reach equilibrium.

Answer:
D. equilibrium
6 0
4 years ago
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