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Yanka [14]
2 years ago
8

Which component of the galaxy is the arrow pointing to? a galaxy with the arrow pointing to the space between the fixed points o

f light in the sky Dust Gravity Moons Sun
Chemistry
2 answers:
VARVARA [1.3K]2 years ago
8 0

A would be correct

srry u had to wait long

guapka [62]2 years ago
5 0

Answer:

A

Explanation:

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What must take place for copper metal to be oxidized?
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Un catión trivalente contiene 75 nucleones y 45 neutrones, Señale el número de electrones que posee dicho catión.
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10 electrons

Explanation:

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Write a chemical equation for the following reaction. (Type your answer using format CH4 for CH4.) In water, iron(III) chloride
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FeCl3(aq) -

3NaOH(aq) 0 Fe(OH)3(s) -

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Read 2 more answers
The combustion reaction of isopropyl alcohol is given below: C 3 H 7 O H ( l ) + 9 2 O 2 ( g ) → 3 C O 2 ( g ) + 4 H 2 O ( g ) T
jek_recluse [69]

Answer:

the heat of formation of isopropyl alcohol is -317.82 kJ/mol

Explanation:

The heat of combustion of isopropyl alcohol is given as follows;

C₃H₇OH (l) +(9/2)O₂ → 3CO₂(g) + 4H₂O (g)

The heat of combustion of CO₂ and H₂O are given as follows

C (s) + O₂ (g) → CO₂(g) = −393.50 kJ

H₂ (g) + 1/2·O₂(g)   →  H₂O (l) = −285.83 kJ

Therefore we have

3CO₂(g) + 4H₂O (g) → C₃H₇OH (l) +(9/2)O₂ which we can write as

3C (s) + 3O₂ (g) → 3CO₂(g) = −393.50 kJ × 3  =

4H₂ (g) + 2·O₂(g)   →  4H₂O (l) = −285.83 kJ × 4

3CO₂(g) + 4H₂O (g) → C₃H₇OH (l) +(9/2)O₂ = +2006 kJ/mol

-1180.5 - 1143.32 +2006 = -317.82 kJ/mol

Therefore, the heat of formation of isopropyl alcohol = -317.82 kJ/mol.

3 0
3 years ago
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