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Rama09 [41]
3 years ago
12

Can someone help me plz

Chemistry
1 answer:
Sidana [21]3 years ago
4 0
That answer is what characteristic you have.
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How much heat does it take to melt 5.0g solid copper?
Leya [2.2K]

Answer:

Q=1.04kJ

Explanation:

Hello,

In this case, for latent heat (phase change) we need to consider the enthalpy associated with the involved process, here, melting or fusion; thus, the enthalpy of fusion of copper is 13.2 kJ/mol, therefore, the heat is computed as:

Q=m\Delta H_{fus}

Nevertheless, since the given enthalpy is per mole of copper, we need to use its atomic mass to perform the correct calculation as follows:

Q=5.0g*\frac{1mol}{63.54}* 13.2\frac{kJ}{mol}\\ \\Q=1.04kJ

Which is positive as it needs to be supplied to the system.

Best regards.

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3 years ago
Calcium carbonate is a compound that is used to make chalk for drawing on rocks or pavement. One molecule has one atom of calciu
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the chemical formula is caca3

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2 years ago
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Propanoic acid (propionic acid) has the formula CH3CH2COOH. Draw the conjugate base, that is, the structure that results from de
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Answer:

Conjugate base: Propionate

Explanation:

  • Conjugate base contains one less proton as compared to it's parent acid. Deprotonation occurs from most acidic region.
  • Propionic acid deprotonates to produce it's strong conjugate base propionate.
  • In propionic acid, -OH group in -COOH functional moiety dissociates to produce H^{+}. Because the O-H bond electrons remains highly polarized towards oxygen atom due to electron withdrawing inductive effect as well as resonating effect of -COOH moiety.
  • Structure of conjugate base has been shown below.

7 0
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A solenoid is a coil of wire that produces a magnetic field when carrying an electric current. The strength of the magnetic fiel
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Answer: Motion, providing a burst of power that can move a specific part of the device.

Explanation: Hope this helps

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2 years ago
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True, cracking distillation is one process used to break hydrocarbons into smaller and more useful parts. This is achieved by using high temperatures and pressures with a catalyst. The most common catalyst used are the zeolites.
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