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Maksim231197 [3]
3 years ago
7

What term refers to elements in group 18 that only react with other elements under special laboratory conditions?

Chemistry
2 answers:
baherus [9]3 years ago
6 0
I m so this for sure it’s halogens
Savatey [412]3 years ago
5 0

Answer:

Metalloids are found along the line between metals and non-metals on a periodic table. They are chemical elements that have properties in between those of metals and non-metals. ... Noble gases are all in group 18 on a periodic table.

Explanation:

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natima [27]

\huge \bold \red{question}

How can telescopes aid visualizing the electromagnetic spectrum?what is the “best place” for telescopes “to detect most radiation” and why?

\huge \bold \green{answer} \\

Astronomers use telescopes that detect different parts of the electromagnetic spectrum. Each type of telescope can only detect one part of the electromagnetic spectrum. There are radio telescopes, infrared telescopes, optical (visible light) telescopes and so on.

The best place to detect most radiation is above the blocking atmosphere, so some telescopes are put in orbit around the Earth. Even visible light is distorted by the atmosphere, so clearer pictures can be got from orbiting telescopes.

3 0
3 years ago
2(x+2) -4(2x-3)=4(2x-1)
rodikova [14]

Answer:

x = 10/7

Explanation:

2(x + 2) - 4(2x - 3) = 4(2x - 1),

2x + 4 - 8x + 12 = 8x - 4,

-6x + 16 = 8x - 4,

20 = 14x,

x = 20/14 or 10/7

8 0
3 years ago
A 1.00-mole sample of C6H12O6 was placed in a vat with 100 g of yeast. If 32.3 grams of C2H5OH was obtained, what was the percen
Rasek [7]

Answer:

y = 35.06 %.

Explanation:

The reaction of fermentation is:

C₆H₁₂O₆  →  2C₂H₅OH + 2CO₂      (1)        

From the reaction (1) we have that 1 mol of C₆H₁₂O₆ produces 2 moles of C₂H₅OH, then the number of moles of C₂H₅OH is:

n = \frac{2 moles C_{2}H_{5}OH}{1 mol C_{6}H_{12}O_{6}}*1 mol C_{6}H_{12}O_{6} = 2 moles C_{2}H_{5}OH

Now, we need to find the mass of C₂H₅OH:

m = n*M = 2 moles*46.07 g/mol = 92.14 g  

Finally, the percent yield of C₂H₅OH is:

\% = \frac{32.3 g}{92.14 g}*100 = 35.06 \%

Therefore, the percent yield of C₂H₅OH is 35.06 %.

I hope it helps you!

6 0
3 years ago
Which describe a molecules (select all that apply)a) It can be two or more of the same elements combine together.b) It can be th
kenny6666 [7]

combinedAnswer

It can be two or more of the same elements combine together

It can be two or more different elements combined

Step-by-step explanation:

A molecule is a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.

A molecule can also be two or more different elements combined.

7 0
2 years ago
which of the following best describes a neutron? A. It is located in the electron cloud and has a negative charge. B. It is loca
Luba_88 [7]

C. It is located in the nucleus and has no charge

Explanation:

here ya go :)

7 0
3 years ago
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