What type of reaction is Cl2+2NaBr=NaCl+Br2

Why is an oxygen molecule more stable than and oxygen atom ?

slava [35]

Answer:

Oxygen molecule is 2 oxygen atoms in a covalent bond, whereas an oxygen atom is an atom with 8 electrons (6 valence electrons).

Thus, clearly, any element in a bonded state is always more stable than when in an un-bonded state.

Explanation:

7 0

3 years ago

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The 1995 Nobel Prize in chemistry was shared by Paul Crutzen, F. Sherwood Rowland, and Mario Molina for their work concerning th

Nikolay [14]

Answer:

$\Delta H_{rxn3}=-162.5 kJ/mol$

Explanation:

The reaction we need to calculate:

$O_3 (g) + Cl (g) \longrightarrow ClO (g) + O_2 (g)$

1) $O_3 (g) + ClO (g) \longrightarrow Cl (g) +2 O_2 (g)$

$\Delta H_{rxn}=-122.8 kJ/mol$

We need the ClO in the products side, so we use the inverse of this reaction:

$Cl (g) +2 O_2 (g) \longrightarrow O_3 (g) + ClO (g)$

$\Delta H_{rxn1}=122.8 kJ/mol$

2) $2 O_3 (g) \longrightarrow 3 O_2 (g)$

$\Delta H_{rxn2}=-285.3 kJ/mol$

Now we need to combine this two:

$Cl (g) +2 O_2 (g) + 2 O_3 (g)\longrightarrow O_3 (g) + ClO (g) + 3 O_2 (g)$

$Cl (g) + O_3 (g)\longrightarrow ClO (g) + O_2 (g)$

The enthalpy of reaction:

$\Delta H_{rxn3}=\Delta H_{rxn1}+ \Delta H_{rxn2}=122.8 kJ/mol-285.3 kJ/mol$

$\Delta H_{rxn3}=-162.5 kJ/mol$

4 0

3 years ago

COMPARE AND CONTRAST PROPANE AND HEXANE ...?

Yakvenalex [24]

In context|organic compound|lang=en terms the difference between propane and hexane is that propane is (organic compound) an aliphatic hydrocarbon, c3h8, a constituent of natural gas while hexane is (organic compound) any of five isomeric aliphatic hydrocarbons, c6h14 they are colorless, volatile liquids. As nouns the difference between propane and hexane is that propane is (organic compound) an aliphatic hydrocarbon, c3h8, a constituent of natural gas while hexane is (organic compound) any of five isomeric aliphatic hydrocarbons, c6h14 they are colorless, volatile liquids.

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5 0

4 years ago

If 350.0 grams of Cr2O3 are reacted with 235.0 grams of elemental silicon, 213.2 grams of chromium metal are recovered. What is

bulgar [2K]

We calculate for the amount of chromium metal in the reactant by,
= 350 x (mass of Cr2/mass of Cr2O3)
= 350 x (104/152)
= 239.47 grams
The amount of Cr metal in the product is only 213.2 grams. Thus, the percent yield.
percent yield = (213.2 grams/239.47) x 100%
= 89%

4 0

3 years ago

Debbie was doing a science lab, and she was instructed to decide whether a piece of plastic would float or sink without actually

Mandarinka [93]

Find the density of the plastic. if the density is less than that of water, it's going to float. If it's more than the density of water, then it's going to sink.

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3 years ago

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