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Lelu [443]
3 years ago
9

a mineral a.has a chemical formula b. occurs naturally c. has a characteristic internal structure d.all of the above

Chemistry
2 answers:
prohojiy [21]3 years ago
6 0
I believe the answer is D all of the above the reason I say this because minerals do occur naturally and they do have a characteristic internal structure. That is why I believe they have a chemical formula
Anuta_ua [19.1K]3 years ago
4 0
Answer: option d. all of the above.

Explanation:

A mineral is an element or a inorganic compound that existes in nature as solid cristals; usually combined with other minerals in ores.

Some examples of minerals, among many, are titania, wich is TiO2, zirconia, which is ZrO2, silica, which is SiO2, gold, Au, silver, Ag.

As you see the definition and examples given meet the whole features included in the stament: a. the have a chemical formula, b they occur naturally, and c.have a characteristic internal structure (that is the way how the atoms are arranged in the specifi cristal).
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The product of reduction of ethyl 4-oxobutanoate with sodium borohydride in ethanol at room temperature for 30 minutes is ethyl 4- hydroxybutanoate .

Sodium borohydride is a relatively selective reducing agent  Ethanolic solutions of Sodium borohydride reduces aldehyde , and ketone , in the presence of acid chloride , ester , epoxide , lactones , acids , nitriles , nitro groups.

The sodium borohydride does not reduce ester group because sodium borohydride is not strong enough and the electrophilicity at carbony carbon of ester is not more as compare toaldehyde , and ketone

The product of reduction of ethyl 4-oxobutanoate with sodium borohydride in ethanol at room temperature for 30 minutes is ethyl 4- hydroxybutanoate .

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tino4ka555 [31]

Answer:

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You can tell the number of protons searching the element in a periodic table and reading its atomic number.

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