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3 years ago

Steel is an example of a pure substance because it is made up of two different metals melted together. (4 points) True False

Chemistry

1 answer:

Lunna [17]3 years ago

3 0

Answer:

false

Explanation:

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Problem Page Question It takes to break a carbon-carbon single bond. Calculate the maximum wavelength of light for which a carbo

Marizza181 [45]

This is a incomplete question. The complete question is:

It takes 348 kJ/mol to break a carbon-carbon single bond. Calculate the maximum wavelength of light for which a carbon-carbon single bond could be broken by absorbing a single photon. Round your answer to correct number of significant digits

Answer: 344 nm

Explanation:

$E=\frac{Nhc}{\lambda}$

E= energy = 348kJ= 348000 J (1kJ=1000J)

N = avogadro's number = $6.023\times 10^{23}$

h = Planck's constant = $6.626\times 10^{-34}Js
$

c = speed of light = $3\times 10^8ms^{-1}$

$348000=\frac{6.023\times 10^{23}\times 6.626\times 10^{-34}\times 3\times 10^8}{\lambda}$

$\lambda=\frac{6.023\times 10^{23}\times 6.626\times 10^{-34}\times 3\times 10^8}{348000}$

$\lambda=3.44\times 10^{-7}m=344nm$ $1nm=10^{-9}m$

Thus the maximum wavelength of light for which a carbon-carbon single bond could be broken by absorbing a single photon is 344 nm

5 0

3 years ago

Which of these factors will cause a solid solute to dissolve faster?

Murrr4er [49]

Answer:

Heat

Explanation:

Higher temperatures cause solid solutes to dissolve at a faster rate than normal

7 0

3 years ago

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Different species of animals in a community would most likely be similar in O A. physical structure. O B. size. O c. abiotic req

Komok [63]

A physical structure

3 0

2 years ago

How many atoms is in h20

Nataly_w [17]

Answer:

3 atoms

Explanation:

2 hydrogen atoms and 1 oxygen atom

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3 years ago

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Vaping is... A. ...Holding an e-cigarette or vape device to look cool. B. ...The act of inhaling and exhaling tobacco from a cig

Lelechka [254]

Answer:

Explanation:

Process of elimination. There is more than just water vapor in a vape so it can't be D, it isn't a cigarette so it can't be B, and A is just clearly not the answer haha.

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3 years ago