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hjlf
3 years ago
9

_________ is a systematic method of naming chemical compounds. This creates an unambiguous and consistent name for any chemical

compound throughout the world. Example: sodium chloride - NaCl hydrochloric acid - HCl carbon tetrachloride - CCl4
Chemistry
1 answer:
Vlada [557]3 years ago
6 0

Answer: IUPAC NOMENCLATURE

Explanation:

IUPAC stands for International Union of Pure and Applied Chemistry. They devised a systematic method for naming compounds in order to create a uniform global unambiguous system of nomenclature hence making it easier for researchers to share information more freely without the hindrance of reporting the same compound using different names in different parts of the world thus creating confusion in chemical literature.

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Which change will cause more CO2 to form in a closed container?​
EastWind [94]

Answer:

Option C Removing Na₂CO₃

Option E Heating the container.

Explanation:

The equation for the reaction is given below:

2NaHCO₃ (s) <=> Na₂CO₃ (s) + CO₂ (g) + H₂O (g)

Enthalpy change (ΔH) = 136 KJ

To obtain more CO₂ do the following:

1. Add more NaHCO₃

From chemical equilibrium, adding more NaHCO₃ means the reactant has increase. Thus, it (the reactant) will react to form more product (CO₂)

2. Removing any of the products. Removing any of the products implies that more reactants are in the reaction vessel than the product. Thus, the reactants will react to produce more products (CO₂)

3. Heating the container. Heating the container will lead to an increase in the temperature of the reaction. Since the enthalpy change (ΔH) is positive it means the reaction is endothermic. Thus, heating the container i.e increasing the temperature will favours the forward reaction i.e more products will be obtained.

NOTE: Pressure has no effect in the reaction system since there is no gaseous reactants.

Considering the options given above, C and E gives the correct answer to the question.

8 0
2 years ago
Is a chair an example of matter
MissTica

Answer:

Yes.............

Explanation:

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5 0
3 years ago
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What's the difference between distillation and fractional distillation?
Elan Coil [88]

Answer:

The main difference between distillation and fractional distillation are:Simple distillation separate liquid with boiling point gaps of at least 50 degrees whereas fractional distillation separates liquid with closer boiling point.

Explanation:

<h2>hope it helps</h2>
6 0
3 years ago
If the amount of radioactive iodine-123, used to treat thyroid cancer, in a sample decreases from 3.2 to 0.4 mg in 39.6 h, what
9966 [12]

Answer:

Half life = 13.197 hour

Explanation:

Given:

Old amount (A₀) = 3.2

New amount (A) = 0.4

Radiation decay time (t) = 39.6 hour

Half life = T(1/2)

Find:

Half life = T(1/2) = T

Computation:

A = A₀e^{-(\frac{0.693t}{T} )}

e^{-(\frac{0.693t}{T} )} = 0.4 / 3.2

-[27.4428 / T] = In (0.125)

-[27.4428 / T] = -2.0794

[27.4428 / T] = 2.0794

T = 13.197

Half life = 13.197 hour

4 0
3 years ago
What is the difference between shells and electrons?
Liono4ka [1.6K]

Answer:

Electron shell.Each shell can contain only a fixed number of electrons, the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.

(Hope it helped you!)

Explanation:

7 0
2 years ago
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