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Andreyy89
3 years ago
15

Which is the most accurate description of compounds?

Chemistry
2 answers:
Alex787 [66]3 years ago
8 0
The answer has to be D
V125BC [204]3 years ago
3 0

Answer: Option (d) is the correct answer.

Explanation:

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

For example, NaCl, HCl, AlCl_{3}, etc are all compounds.

Compounds are also pure substances like elements as they can be broken down into their constituent particles.

Whereas substances that are made up of only one type of atom are known as elements.

Thus, we can conclude that the most accurate description of compounds is that they are made up of atoms of 2 or more elements that are chemically combined.

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Given the following values of pKa, determine which is the weakest base of the answers listed. Acid pKa HClO2 1.95 HClO 7.54 HCOO
professor190 [17]

Answer:

HClO 7.54

Explanation:

Hypochlorous acid (HClO) is a weakest acid because the pKa value of Hypochlorous acid is very high among the options given in the activity. pKa is a method which is used in order to identify the strength of an acid. The higher the value of pKa of a liquid, lower the strength of an acid while lower the value of pKa of chemical, higher the strength of an acid. In the options, HClO2  is a strong acid due to high lower pKa value.

4 0
3 years ago
Compared to an atom of C-12, an atom of C-14 has
KonstantinChe [14]

Explanation:

Carbon-12 atoms have stable nuclei because of the 1:1 ratio of protons and neutrons.

Carbon-14 atoms have nuclei which are unstable. C-14 atoms will undergo alpha decay and produce atoms of N-14. Carbon-14 dating can be used to determine the age of artifacts which are not more than 50,000 years old.

8 0
3 years ago
Which best describes the relationship between the terms frequency, wavelength, and hertz?
Oksanka [162]

Answer:

The correct answer is - Frequency is the number of wavelengths, which is measured in hertz.

Explanation:

Frequency is the number of waves that go through a fixed point at a particular time. Hertz is the SI unit for frequency which means that one hertz is equal to a unit number of waver passes in a unit time to a fixed point.

As the frequency of a wave increases which means the number of waves increases in the unit time, the shorter the wavelength will be.

a higher frequency wave has more energy than a lower frequency wave with the same amplitude.

5 0
3 years ago
Which of the following materials is a substance, silver, air ,gasoline or staintless steel?
Irina-Kira [14]
Silver is the only substance!
4 0
3 years ago
Which of the following releases the greatest amount of energy as it proceeds? Assume the same mass of starting material is used
Ivanshal [37]
The answer should be <span>C. nuclear reaction.</span>
4 0
3 years ago
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