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Jobisdone [24]
3 years ago
8

Reliable results are results that can be... A: communicated B: evaluated C: duplicated

Chemistry
2 answers:
TEA [102]3 years ago
5 0
I wanna say duplicated...because if you can repeat the same answer twice then its probably right
insens350 [35]3 years ago
4 0
Reliable results are results that can be... A: Communicated
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The diagram below shows a cell placed in a solution.
Sholpan [36]

it will expand as water moves into it.


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2 years ago
How many photons are produced in a laser pulse of 0.497 J at 469 nm?
dimulka [17.4K]
<span>E=hν</span> where E is the energy of a single photon, and ν is the frequency of a single photon. We recall that a photon traveling at the speed of light c and a frequency ν will have a wavelength λ given by <span>λ=<span>cν</span></span>λ will have an energy given by <span>E=<span><span>hc</span>λ</span></span><span>λ=657</span> nm. This will be <span>E=<span><span>(6.626×<span>10<span>−34</span></span>)(2.998×<span>108</span>)</span><span>(657×<span>10<span>−9</span></span>)</span></span>=3.0235×<span>10<span>−19</span></span>J</span> So we now know the energy of one photon of wavelength 657 nm. To find out how many photons are in a laser pulse of 0.363 Joules, we simply divide the pulse energy by the photon energy or <span>N=<span><span>E<span>pulse </span></span><span>E<span>photon</span></span></span>=<span>0.363<span>3.0235×<span>10<span>−19</span></span></span></span>=1.2×<span>1018</span></span>So there would be <span>1.2×<span>1018</span></span><span> photons of wavelength 657 nm in a pulse of laser light of energy 0.363 Joules.</span>
7 0
2 years ago
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Which of the following methods can be used to completely separate a solution containing alcohol and water?
liq [111]
A) i think is the answerrrrr
8 0
3 years ago
How much heat is required to increase the temperature of 100.0 grams of iron from 15.0oC to 40.2oC? (The specific heat of iron i
Ksenya-84 [330]
Answer is: 1160 J of heat Is required to increase the temperature.
m(Fe) = 100 g.
∆T = 40,2 - 15 = 25,2°C.
C(Fe) = 0,46 J/g•°C.
Q = m(Fe) • C • ∆T.
Q = 100 g • 0,46 J/g•°C • 25,2°C
Q = 1160 J.
C - specific heat.

3 0
2 years ago
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Help me please asap ill mark brainlist
antiseptic1488 [7]

Answer:

i think its the first one not 100% on it tho but i know for a fact its NOT c

Explanation:

7 0
3 years ago
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