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Mashutka [201]
3 years ago
6

When you look at a speck of mold how many microbes are you most likely seeing

Chemistry
2 answers:
Zigmanuir [339]3 years ago
7 0
You will see about 50.
Blababa [14]3 years ago
4 0
Can you even SEE microbes?

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The most reactive metals are located in which area of the periodic table?
SCORPION-xisa [38]
The answer is b.Far left
8 0
3 years ago
Find the density of metal with a volume 4.0 cm and a mass of 8.0 grams.
olga_2 [115]
D=m/v

so,

d=8.0g/4.0cm

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3 0
2 years ago
Uranium has an atomic weight of 238 amu.
shepuryov [24]

Answer:

U= 238g/mol

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4 0
3 years ago
Nuclear energy is the heat energy produced during controlled splitting, or ________ , of radioactive isotopes
erma4kov [3.2K]
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3 0
3 years ago
Regarding the Lyman series of hydrogen, calculate the frequency of the n = 5 line.
zvonat [6]
The Lyman series can be expressed in the formula <span><span>1/λ</span>=<span>RH</span><span>(1−<span>1/<span>n2</span></span>) where </span><span><span>RH</span>=1.0968×<span>107</span><span>m<span>−1</span></span>=<span><span>13.6eV</span><span>hc

</span></span></span></span>Where n is a natural number greater than or equal to 2 (i.e. n = 2,3,4,...). Therefore, the lines seen in the image above are the wavelengths corresponding to n=2 on the right, to n=∞on the left (there are infinitely many spectral lines, but they become very dense as they approach to n=∞<span> (Lyman limit), so only some of the first lines and the last one appear).
 The wavelengths (nm) in the Lyman series are all ultraviolet
:2 3 4 5 6 7 8 9 10 11
 Wavelength (nm) 121.6 102.6 97.3 95 93.8 93.1 92.6 92.3 92.1 91.9 91.18 (Lyman limit)
In your case for the n=5 line you have to replace "n" in the above formula for 5 and you should get a value of 95 x 10^-9 m for the wavelength. then you have to use the other equation that convert wavelength to frequency. </span>
4 0
3 years ago
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