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nevsk [136]
2 years ago
10

Mildred takes a pound of frozen hamburger meat out of the freezer and puts it into the refrigerator. Which of the following best

describes the direction of heat flow?.
Chemistry
2 answers:
Zinaida [17]2 years ago
8 0

Answer:

from the air in the refrigerator to the hamburger. :)

Explanation:

Sedaia [141]2 years ago
5 0
The heat will flow into the frozen hamburger. By gaining heat, it will thaw. Remember heat flows from high to low. since the temperature of the refrigerator is lower than the freezer when you put in the burger there, it is colder inside the burger than outside, so heat will go in. 
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A local am radio station broadcasts at a wavelength of 349m, calculate the energy of the wavelength at which it is broadcasting?
Juli2301 [7.4K]

Answer:

E = 5.69x10⁻²⁸m

Explanation:

To solve this question we neeed to convert the wavelength in meters to energy in joules using the equation:

E = hc / λ

<em>Where E is energy in joules, h is Planck's constant = 6.626x10⁻³⁴Js</em>

<em>c is light constant = 3.0x10⁸m/s</em>

<em>And λ is wavelength in meters = 349m</em>

Replacing:

E = 6.626x10⁻³⁴Js*3.0x10⁸m/s / 349m

E = 5.69x10⁻²⁸m

5 0
3 years ago
Why do we feel cold when we touch the iron?
Darya [45]

Heat flows from our body to iron

8 0
2 years ago
Examine the given reaction. NH4NO3(s) → NH4+(aq) + NO3–(aq) ΔH° = 25.45 kJ/mol ΔS° = 108.7 J/mol·K Which of the given is correct
kobusy [5.1K]

Answer:

B)−6,942 J /mol

Explanation:

At constant temperature and pressure, you cand define the change in Gibbs free energy, ΔG, as:

ΔG = ΔH - TΔS

Where ΔH is enthalpy, T absolute temperature and ΔS change in entropy.

Replacing (25°C = 273 + 25 = 298K; 25.45kJ/mol = 25450J/mol):

ΔG = ΔH - TΔS

ΔG = 25450J/mol - 298K×108.7J/molK

ΔG = -6942.6J/mol

Right solution is:

<h3>B)−6,942 J /mol</h3>

8 0
3 years ago
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Answer:

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  • Mitosis ensures that the same DNA is found between the parent
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