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lions [1.4K]
3 years ago
5

Which option can be classified as a pure substance

Chemistry
2 answers:
AnnyKZ [126]3 years ago
7 0
There isn’t any options
Zina [86]3 years ago
4 0
I have done this question before and even though you didn’t provide the options. I think the correct option is elements
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How much of a 24-gram sample of Radium-226 will remain unchanged at the end of three half-life periods?
shutvik [7]

Answer:

The right answer is "3 g".

Explanation:

Given:

Initial mass substance,

M_0=24 \ g

By using the relation between half lives and amount of substances will be:

⇒ M=\frac{M_0}{2^n}

        =\frac{24}{2^3}

        =3 \ g

Thus, the above is the correct answer.

8 0
3 years ago
Definition of proton and example
gtnhenbr [62]

Answer:

An elementary particle that is identical with the nucleus of the hydrogen atom, that along with the neutron is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron.

Example:

The nucleus of a hydrogen atom or the H+ ion is an example of a proton. Regardless of the isotope, each atom of hydrogen has 1 proton; each helium atom contains 2 protons; each lithium atom contains 3 protons and so on.

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3 years ago
When multiplying numbers in scientific notation what do you do with exponents?
Basile [38]

Answer:

Subtract them.

Explanation:

''''"Since all number in scientific notation have base 10, we can always multiply them and divide them. To multiply two numbers in scientific notation, multiply their coefficients and add their exponents. To divide two numbers in scientific notation, divide their coefficients and subtract their exponents."""""

I was actually learned about this in school just found an source.

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4 years ago
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Answer:

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3 years ago
What is common among all three types of forests in the Venn diagram?
Kruka [31]

Answer:

it looks like forests

Explanation:

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