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Novosadov [1.4K]
3 years ago
5

The compounds 2-butanol and 2-butene both contain

Chemistry
2 answers:
valentina_108 [34]3 years ago
4 0
The answer is (3) carbon atoms. For 2-butanol, it contains single bonds only and with C, O, H atoms. For 2-butene, it contains single bonds and double bonds both. And contains C, H atoms.
RoseWind [281]3 years ago
3 0

Answer:

(3) carbon atoms

Explanation:

2- butanol is a secondary alcohol containing C,H and O with a molecular formula: C4H10O and a structural formula: CH3CH2CH(OH)CH3

2- butene is an unsaturated hydrocarbon i.e. an alkene containing C and H only with a molecular formula: C4H8 and a structural formula:

CH3CH2CH=CH2

Based on the given options, the only common ground between 2-butanol and 2-butene is that both contain carbon atoms.

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KNO3(s) --> K+(aq) + NO3-(aq)
ella [17]

Answer:

KNO₃(s) + 35,1 kJ → K⁺(aq) + NO₃⁻(aq)

Explanation:

In the reaction:

KNO₃(s) → K⁺(aq) + NO₃⁻(aq)

The <em><u>heat absorbed</u></em> for the reaction (Because the temperature decreases) is:

Q = C×m×ΔT

Where C is specific heat (4,18J/g°C); m is mass (100g); ΔT is (30,0°C-21,6°C = 8,4°C)

Replacing:

Q = 4,18J/g°C×100g×8,4°C

<em><u>Q = 3511 J</u></em>

Now, moles of KNO₃ are:

10,1g×(1mol / 101g) = <em><u>0,1 moles.</u></em>

Heat of solution in kJ/mol is:

3,511 J / 0,1 mol = <em><u>35,1 kJ</u></em>

As the heat was absorbed for the reaction, right answer is:

<em>KNO₃(s) + 35,1 kJ → K⁺(aq) + NO₃⁻(aq)</em>

That means the reaction needs the heat to occurs.

I hope it helps!

6 0
3 years ago
How many moles are in 16.94g of water?
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