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ziro4ka [17]
3 years ago
13

what is the specific latent heat of fusion for a substance that takes 550 kj to melt 14 kg at 262 k? brainly answers

Chemistry
1 answer:
Ket [755]3 years ago
3 0

q = mL

L = q/m = 550 kJ/14 kg = 39 kJ/kg

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H2, N2, O2 molecules. . . A)must be polar. must be nonpolar. . B)can be polar or nonpolar depending on geometric . C)configurati
LenKa [72]

Answer: The correct option is A.

Explanation: The given molecules are the molecules of same element.

These molecules are considered as diatomic species.

Polar molecules are the molecules in which some polarity is present in the bond. These molecules are formed when there is some difference in the electronegativities of the elements. Example: HCl

Non-polar molecules are the molecules where no polarity is present in the bond. These molecules are formed when there is no difference in the electronegativities of the elements. Example: H_2, O_2

The given molecules are non-polar in nature.

Hence, these molecules must be non-polar. So, the correct option is A.

6 0
3 years ago
Read 2 more answers
Which best describes the structure of 2-butene
lyudmila [28]
The 2 represents that it is a double carbon bond
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6 0
4 years ago
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How many significant figures are in 4.8cm?
kramer

Answer: 2. they are 4 and 8

Explanation: I took the exam. I hope I helped :)

4 0
3 years ago
Methylamine (ch3nh2) is a weakly basic compound. calculate the kb for methylamine if a 0.253 m solution is 4.07% ionized.
MariettaO [177]
Answer is: Kb for methylamine is 4.37·10⁻⁴.<span>
Chemical reaction: CH</span>₃NH₂ + H₂O → CH₃NH₃⁺ + OH⁻.
c(CH₃NH₂) = 0.253 M.
α = 4.07% ÷ 100% = 0.0407.
[CH₃NH₃⁺] = [OH⁻] = c(CH₃NH₂) · α.
[CH₃NH₃⁺] = [OH⁻] = 0.253 M · 0.0407.
[CH₃NH₃⁺] = [OH⁻] = 0.0103 M.
[CH₃NH₂] = 0.253 M - 0.0103 M.
[CH₃NH₂] = 0.2427 M.
Kb = [CH₃NH₃⁺] · [OH⁻] / [CH₃NH₂]. 
Kb = (0.0103 M)² / 0.2427 M.
Kb = 4.37·10⁻⁴.
8 0
3 years ago
Plz help ugh!! will upvote
erma4kov [3.2K]
All are CORRECT except (d)
6 0
3 years ago
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