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Vikki [24]
3 years ago
12

When ice cubes melt in a glass of water, a current forms in which heat energy moves from particles with a higher temperature to

particles with a __________ temperature?
Chemistry
1 answer:
Ivenika [448]3 years ago
7 0

Answer:

Lower

Explanation:

Heat flows due to a temperature gradient, from a higher temperature to a lower temperature.

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A chemical combination of two or more atoms is a(n) .
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Molecule

Explanation:

Its simple definition

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which of these sentences is true about nitrogen? a- as nitrogen is the rarest gas in the atmosphere, very few organism can use i
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B is true because plants can only use nitrogen in the form of nitrates, no other living thing needs nitrogen therefore the percentage of nitrogen in the atmosphere is 79%
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3 years ago
16) How many photons are contained in a burst of yellow light (589 nm) from a sodium lamp that contains 609 kJ of energy?
Len [333]
The correct answer to this question is this one:

find the energy of one photon:

<span>E=h*<span>c/λ
</span></span>
divide the energy given by the energy of one photon of that wavelength

What I've done so far is convert wave length to m and energy to j. 

E photon = h * x / wave length
E = (6.626 x 10^-43)(3.00 x 10^8) / 587 ^ -9  = 3.38 x 10 ^18 J
3.38 x 10 ^18 J x 1000 kj / 1 j = 3.37 x 10 ^ 16 Kj
609 kJ/  3.37 x 10 ^ 16 Kj =  1.81 x 10 ^ 16

E = (6.626 x 10^-34)(3.00 x 10^8) / 587 ^ -9 = 3.38 x 10 ^19 J
3.38 x 10 ^19 J x 1000 kj / 1 j = 3.37 x 10 ^ -16 Kj
609 kJ/ 3.37 x 10 ^ 16 Kj = 1.81 x 10 ^ 18 but the answer is  1.81 × 10^24 photons

3.38 x 10 ^-19 J
should be negative

then 3.38 x 10 ^18 J x 1kJ/1000 J

you're converting from J to kJ.. just like meters to kilometres, you wouldn't multiply you would divide
4 0
3 years ago
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A beaker contains 578 mL of water. Convert to quarts
Lapatulllka [165]
0.578 mL = 0.611 US qt = 0.509 Imp qt

Do you mean US quarts or Imperial quarts?

578 mL × \frac{1 L}{1000 mL} = 0.578 L

US quarts

0.578 L × \frac{1.057 qt}{1 L} = 0.611 qt

Imperial quarts

0.578 L × \frac{0.880 qt}{1 L} = 0.509 qt
7 0
3 years ago
Read 2 more answers
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