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ser-zykov [4K]
3 years ago
7

Which substance can be broken down by chemical means

Chemistry
2 answers:
djyliett [7]3 years ago
5 0

Answer: Option (1) is the correct answer.

Explanation:

A compound is defined as the substance in which different elements are chemically combine together in a fixed ratio by mass.

For example, chemical formula of ammonia is NH_{3}.

Here, in NH_{3} the atoms are present in 1:3 ratio.

A compound can be divided into its constituent or simpler substances by chemical means.

On the other hand, an element is defined as a substance which contains atoms of only one type.

For example, Al, Sb, Ar etc are all elements.

An element can never be divided into its constituent parts.

Thus, we can conclude that out of the given options ammonia is the substance which can be broken down by chemical means.

Maru [420]3 years ago
4 0

Answer:

1. Ammonia  

Step-by-step explanation:

Ammonia, NH₃, is a <em>compound</em> of nitrogen and hydrogen.

Thus, it can be broken down by chemical means into the <em>elements</em> nitrogen and hydrogen.

The other options are <em>wrong</em>, because Al, Sb, and Pb are elements. They cannot be broken down chemically into simpler substances.

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A crushed garlic will have a lot of flavor when placed in food due to the surface area that is in contact with the food. When we have a large piece of garlic, only the external part touches the food and its full capacity is not used. When we reduce the size of the year by crushing the internal parts that were not in contact with the food, now they will be, in addition, liquids are also released due to the pressure exerted on the garlic and these liquids mix more easily with the food and they give it more flavor. For better understanding we can see the following figure:

Simply to understand it, in the figure, there is a clove of whole garlic represented by the rectangle that will have a height of 3 and a width of 1, the units do not matter in this case. The area that is in contact will be equal to 8, but if we divide the garlic into three equal parts, it will have a contact area greater than 12. Therefore, the more we divide the garlic, the more area it will be in contact with the food and will give it more flavor.

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1 year ago
Which chemical change causes a cake to rise?
allochka39001 [22]
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8 0
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Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C 6H 5CO 2H) and 0.15M sodium benzoate (C
gtnhenbr [62]

Answer:

pH=3.97

Explanation:

Hello,

In this case, for the calculation of the pH of the given buffer we need to use the Henderson-Hasselbach equation:

pH=pKa+log(\frac{[base]}{[acid]} )

Whereas the pKa for benzoic acid is 4.19, the concentration of the base is 0.15 M (sodium benzoate) and the concentration of the acid is 0.25 M (benzoic acid), therefore, the pH turns out:

pH=4.19+log(\frac{0.15M}{0.25M} )\\\\pH=3.97

Regards.

4 0
3 years ago
Calculate the energy required to heat 406.0mg of cyclohexane from 33.5°C to 38.9°C . Assume the specific heat capacity of cycloh
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Answer:

Q = 4.056 J

Explanation:

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∴ m = 406.0 mg = 0.406 g

∴ <em>C </em>= 1.85 J/g.K

∴ T1 = 33.5°C ≅ 306.5 K

∴ T2 = 38.9°C = 311.9 K

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⇒ Q = (0.406 g)(1.85 J/gK)(5.4 K)

⇒ Q = 4.056 J

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This description needs a unit describing the system of measurement.

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