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eimsori [14]
3 years ago
8

_______ rock can be changed directly into _______ rock with the application of heat and pressure.

Chemistry
1 answer:
Vadim26 [7]3 years ago
5 0
 a rock can be changed directly into metamorphic <span>rock with the </span><span>application of heat and pressure.</span>
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There are ____ main groups in the modern periodic table of elements
antoniya [11.8K]

There are 18 numbered groups in the periodic table, and the f-block columns (between groups 3 and 4) are not numbered. The elements in a group have similar physical or chemical characteristics of the outermost electron shells of their atoms (i.e., the same core charge), as most chemical properties are dominated by the orbital location of the outermost electron. There are three systems of group numbering. The modern numbering group 1 to group 18 is recommended by the International Union of Pure and Applied Chemistry (IUPAC). It replaces two older naming schemes that were mutually confusing. Also, groups may be identified by their topmost element or have a specific name. For example, group 16 is variously described as the oxygen group and as the chalcogens.

5 0
3 years ago
Please Help!!! Will mark brainliest plus 30 points!!!
madam [21]
H2O is one.
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7 0
3 years ago
Select the correct empirical formula for each molecular formula given.
Sauron [17]

Answer:

CH₂O

Explanation:

Empirical formula:

It is the simplest formula gives the ratio of atoms of different elements in small whole number.

Molecular formula:

Molecular formula shows the actual whole number ratio of elements present in compound.

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Empirical formula = CH₂O

In molecular formula six moles of carbon six moles of oxygen and 12 moles of hydrogen are present.

To get the smallest whole number we divide the each number by 6 and we get CH₂O which is empirical formula of C₆H₁₂O₆.

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How do you use nonmetal in a sentence?
skad [1K]
Here Is A Sentence You Could Possibly Use:

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(You can replace the two given elements with whatever two non-metallic elements you like.)

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What does it mean for a strong base to be in equilibrium
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