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3 years ago

What's the answer will mark brainliest

Chemistry

2 answers:

Serga [27]3 years ago

4 0

Answer:

D. Mars

hope it helps...

NemiM [27]3 years ago

3 0

Answer:

D Mars is the correct answer

hope it is helpful to you

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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

Calcium carbide (CaC2) reacts with water to form acetylene (C2H2) and Ca(OH)2.

Sergio [31]

The answer is -60.57 = -60.6 KJ.
CaC2(s) + 2 H2O(l) ---> Ca(OH)2(s) +C2H2(g) H= -127.2 KJ
Hf C2H2 = 226.77
Hf Ca(OH)2 = -986.2
Hf H2O = -285.83
Now,

add them up. 226.77 - 986.2 + (2*285.83) = -187.77
Add back the total enthalpy that is given in the question
-187.77+127.2 = -60.57

8 0

3 years ago

Read 2 more answers

Find the precent composititions in (NH4)2S

ruslelena [56]

Ammonium sulfide
68,154 g/mol
41.10 percent nitrogen, 11.83 percent hydrogen, and 47.04 percent sulfur.

8 0

3 years ago

The molecule below contains both an aldehyde and a ketone functional group. select only the carbonyl carbon atom of the aldehyde

4vir4ik [10]

Carbonyl compounds are those compounds in which carbon aton is doubly bonded to oxygen atom.
The hybridization of carbon and oxygen in carbonyl compounds is Sp². Folowing are examples of carbonyl compounds,

1. Ketones
2. Aldehydes
3. Carboxylic Acids
4. Acyl Halides
5. Amides
6. Esters
7. Anhydrides e.t.c
Result:
In given the structure the carbonyl groups are highlighted RED, as shown below.

7 0

3 years ago

What volume of 2. 5m naoh solution contains 3. 25 mol of naoh?.

Klio2033 [76]

Answer:

molarity = moles of solute/liters of solution

0.25 M NaOH = 0.25 mol NaOH/L

mass = moles (n) × molar mass (M)

n(NaOH) = 0.25 mol

M(NaOH) = 39.997 g/mol

m(NaOH) = 0.25 mol × 39.997 g/mol = 9.999 g

3 0

2 years ago

What's the answer will mark brainliest​

What's the answer will mark brainliest