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Sever21 [200]
3 years ago
13

What are the classification of most of the elements described as?

Chemistry
2 answers:
pochemuha3 years ago
7 0

Answer:

periodic

Explanation:

Elements are organised in the <em>periodic</em> table of elements, which is essentially a big table that lists elements in order by increasing atomic number and atomic mass.

Each row of a periodic table is called a 'period', and when elements are arranged in the above-described way, there is a repeating pattern because each column has elements that share properties. So as you move across a period (or row), you get elements of different properties, but as you move across another period, you get different elements with similar properties as before.

Thus, it's periodic.

irga5000 [103]3 years ago
7 0

The classification of most elements are described as metals.

In the picture below you will see the periodic table. It will show you elements that are metals, semi-metals, or non-metals.

As you can see in the image, most of the elements are classified as metals which proves that the answer is metals.

Best of Luck!

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in order to find the molar mass of an unknown compound, a research scientist prepared a solution of 0.930 g of an unknown in 125
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Answer:

Molar mass→ 0.930 g / 6.45×10⁻³ mol = 144.15 g/mol

Explanation:

Let's apply the formula for freezing point depression:

ΔT = Kf . m

ΔT = 74.2°C - 73.4°C → 0.8°C

Difference between the freezing T° of pure solvent and freezing T° of solution

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0.8°C / 5.5 m/°C = m → 0.0516 mol/kg

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0.0516 mol/kg . 0.125 kg = 6.45×10⁻³ moles. Now we can determine the molar mass:

Molar mass (mol/kg) → 0.930 g / 6.45×10⁻³ mol = 144.15 g/mol

3 0
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