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3 years ago

A chemical change in which a single compound breaks down into two or more products is which of the following?

Chemistry

1 answer:

Liono4ka [1.6K]3 years ago

4 0

Answer:

a. Decomposition.

Explanation:

A combination reaction is a reaction where two or more elements or compounds combine to form a single compound. Such reactions may be represented by equations of the following form: X + Y ⇒ XY.

Decomposition reactions are a type of chemical reaction that involves breaking down a compound into smaller compounds or individual elements.
A single-displacement reaction, also known as a single-replacement reaction, is a reaction by which one element replaces other element in a compound.
A double displacement reaction, also known as a double replacement reaction or metathesis, is a type of chemical reaction where two compounds react, and the positive ions (action) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.

Hence, the answer is a decomposition reaction.

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Calculate the volume in litres (L) of 1.41 mol of gas at 68.0 kPa and 27.00 °C (gas constant R = 8.314 J mol K-.).

Pani-rosa [81]

Answer:

3.) 51.7 L

Explanation:

To find the volume, you need to use the Ideal Gas Law:

PV = nRT

In the equation,

-----> P = pressure (kPa)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas constant (8.314 kPa*L/mol*K)

-----> T = temperature (K)

First, you need to convert the temperature from Celsius to Kelvin. Then, you can plug the given values into the equation and simplify to find "V".

P = 68.0 kPa R = 8.314 kPa*L/mol*K

V = ? L T = 27.00 °C + 273 = 300 K

n = 1.41 moles

PV = nRT <----- Ideal Gas Law

(68.0 kPa)V = (1.41 moles)(8.314 kPa*L/mol*K)(300 K) <----- Insert values

(68.0 kPa)V = 3516.822 <----- Multiply right side

V = 51.7 <----- Divide both sides by 68.0

3 0

1 year ago

The ester below can be separated into phenol and an acetate salt, via saponification: heating the ester with a strong base, such

erastovalidia [21]

I found a similar question online which will help me answer your incomplete question. To make it easier, show all the elements of the compound given. It is shown in the second picture attached.

a.) The formula for unsaturation number is shown in the 3rd picture attached. Following this,
n = 8
m = 2(8) + 2 + 0 + 0 - 0 = 18
Thus,
x = Unsaturation number = (18 - 8)/2 = 5
<em>The unsaturation number is 5.</em>

b.) The molar mass of C is 12.01 g/mol; H is 1 g/mol; O is 16 g/mol. So, the molecular weight is:
Molecular weight = 12.01(8) + 8(1) + 2(16) = 136.08 g/mol
<em>The molecular weight of the ester is 136.08 g/mol.</em>

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3 years ago

Select the correct answer. if two half-lives have passed since a scientist collected a 1.00-gram sample of u-235, how much u-235

Ugo [173]

Answer:

0.25 g of U-235 isotope will left .

Formula used :

where,

N = amount of U-235 left after n-half lives = ?

= Initial amount of the U-235 = 1.00 g

n = number of half lives passed = 2

0.25 g of U-235 isotope will left .

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2 years ago

a propane torch is lit inside a hot air balloon during preflight preparations to inflate the balloon. which condition of the gas

earnstyle [38]

Answer:

The pressure remains constant

Explanation:

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Answer:

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