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liubo4ka [24]
3 years ago
12

A molecule of butane and a molecule of 2-butene both have the same total number of

Chemistry
2 answers:
pishuonlain [190]3 years ago
8 0
1) same amount of carbon atoms.

That is why it is still called butane and butene.
but- always signifies 4 carbons

dolphi86 [110]3 years ago
7 0

Answer: Option (1) is the correct answer.

Explanation:

A hydrocarbon that contains only single bonds is known as alkane. Their general formula is C_{n}H_{2n+2}, where n is the number of carbon atoms.

For example, butane (CH_{3}CH_{2}CH_{2}CH_{3}) is an alkane.

Whereas a hydrocarbon that contains at least one double bond is known as an alkene. Their general formula is C_{n}H_{2n}.

For example, 2-butene (CH_{3}CH=CHCH_{3}) is an alkene.

Hence, there are same number of carbon atoms in both butane and 2-butene.

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A 45.0-gram sample of copper metal was heated from 20.0°C to 100.0°C. Calculate the heat absorbed, in kJ, by the metal.
s2008m [1.1K]

Answer:

1.386 KJ

Explanation:

From the question given above, the following data were obtained:

Mass (M) of copper = 45 g

Initial temperature (T1) = 20.0°C

Final temperature (T2) = 100.0°C

Heat absorbed (Q) =..?

Next, we shall determine the change in temperature. This can be obtained as follow:

Initial temperature (T1) = 20.0°C

Final temperature (T2) = 100.0°C

Change in temperature (ΔT) =?

ΔT = T2 – T1

ΔT = 100 – 20

ΔT = 80 °C

Next, we shall determine the heat absorbed by the sample of copper as follow:

Mass (M) of copper = 45 g

Change in temperature (ΔT) = 80 °C

Specific heat capacity (C) of copper = 0.385 J/gºC

Heat absorbed (Q) =..?

Q = MCΔT

Q = 45 × 0.385 × 80

Q = 1386 J

Finally, we shall convert 1386 J to KJ. This can be obtained as follow:

1000 J = 1 KJ

Therefore,

1386 J = 1386 J × 1 KJ /1000 J

1386 J = 1.386 KJ

Thus, the heat absorbed by the sample of the sample of copper is 1.386 KJ.

5 0
3 years ago
You need to make an aqueous solution of 0.182 M aluminum sulfate for an experiment in lab, using a 250 mL volumetric flask. How
Ksju [112]

Answer:

Hence, 15.99 g of solid Aluminum Sulfate should be added in 250 mL of Volumetric flask.

Explanation:

To make 0.187 M of Aluminum Sulfate solution in a 250 mL (0.250 L) Volumetric flask  

The molar mass of Aluminum Sulfate = 342.15 g/mol  

Using the molarity formula:-  

Molarity = Number of moles/Volume of solution in a liter  

Number of moles = Given weight/ molar mass  

Molarity = (Given weight/ molar mass)/Volume of solution in liter  

0.187 M = (Given weight/342.15 g/mol)/0.250 L  

Given weight = 15.99 g  

8 0
3 years ago
What’s the answer to these 3 questions? thanks!
Citrus2011 [14]
Water has h bonding
H-H
Sodium fluoride
I think
4 0
3 years ago
Is the measure of a quantity of energy.<br> Temperature<br> Mole<br> Heat<br> Kinetic motion
Andreas93 [3]

Answer:the answer is moles

Explanation: joules are measurements of energy, and moles Joules

4 0
3 years ago
When trying to determine whether or not an atom gives up electrons easily, do chemists look at electronegativity or ionization p
Archy [21]
Here I found some info at Yahoo answers: https://answers.yahoo.com/question/index?qid=20090119191941AAB7oAb
The more electronegative an atom is the more unwilling it is to lose its electrons in a compound. If you do try to take a very EN atom away from a compound you'll need to apply a lot of energy for that to happen. I can give an example of a single atom though 

<span>Cl has 7 valence electron filled and every atom wants to be like nobles (noble gases), so it's not going to give an electron away b/c it's really close to being like a noble gas. Noble gases are the most stable atoms, which is why I say stability counts.</span>
4 0
3 years ago
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