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stiks02 [169]
2 years ago
11

Which of the following materials is a metalloid or semi-metal (has some metallic properties and some properties similar to non-m

etals)?
Group of answer choices

Na

silicon (Si)

NaCl

selenium (Se)
Chemistry
1 answer:
melamori03 [73]2 years ago
3 0
Silicon (si) is a scientific metal
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Answer:

transfer pipet that had markings every 0.1 mL.

Explanation:

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Fred mixes a solution using two types of solutions: 0.60 liters containing 10% alcohol and 0.40 liters containing 35% alcohol. W
insens350 [35]

The alcohol concentration of the mixed solution is 20%

Simplification :

Based on the given condition, formulate :

35% ×0.40 + 0.6 ×10% ÷{ 0.4+0.6}

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Calculate the sum or difference : \frac{0.2}{1}

Any fraction with denominator 1 is equal to numerator : 0.2

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Calculate the product or quotient : \frac{20}{100}

A fraction with denominator equals to 100 to a percentage 20%.

How do you find the concentration of a mixed solution?

In general when your are mixing two different concentrations together first calculate number of moles for each solution (n=CV ,V-in liter) then add them together it will be total moles,then concentration of mixture will be = total moles / total volume(liter).

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1 year ago
Explain why a city that receives 10 hours more light each day has colder average temperatures. Explain
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Explanation:

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Which best describes the act of using senses or tools to gather information?
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The act of using senses or tools to gather information is making an observation
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Use the element symbols to write the electronic configuration Na
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Electron Configuration is the distribution of electrons of an atom or molecule in an atomic or molecular orbitals.

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Na: 1s² 2s² 3p⁶ 3s¹

Hope this helps!
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