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DENIUS [597]
3 years ago
6

Which mathematical statement correctly relates qsys and qsurr? A. qsys = qsurr B. qsys < qsurr C. qsys > –qsurr D. qsys =

–qsurr
Chemistry
1 answer:
tatiyna3 years ago
4 0

Answer:

  • <u><em>Option D. qsys = - qsurr</em></u>

Explanation:

The symbol q is used to denote heat energy.

Considering positive the heat absorbed and negative the heat released:

  • <em>qsys</em> is the heat absorbed by the systme

  • <em>qsurr</em> is the heat absorbed by the surroundings

When the system does not do work on or receive work from the surroundings, the first law of thermodynamics states that:

  • <em>qsys </em>+ <em>qsurr</em> = 0

From which:

  • <em>qsys = - qsurr ← </em>answer

That is the option D.

That means that, the heat abosorbed by the system (if <em>qsys</em> is positive) equals the heat released by the surroundings, or the heat released by the system (if <em>qsys</em> is negative) equals the heat absorbed by the surroundings.

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Answer:They are small because they don't need larger bodies to enable them attach to the females. They don't have fully formed gut because when they reach adulthood their digestive system stops functioning.

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3 0
3 years ago
What is the minimum volume of 5.50 M HCl necessary to neutralize completely the hydroxide in 718.0 mL of 0.183 M NaOH
Deffense [45]

The volume of HCl required is 23.89 mL

Calculation of volume:

The reaction:

HCl + NaOH \rightarrow NaCl + H_2O

As HCl and NaOH react in 1 : 1 ratio.

Volume of NaOH= 718 mL

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Concentration= 5.50M

Using the dilution formula:

M_1\times V_1(NaOH)= M_2\times V_2(HCl)

0.183\times 718= 5.50 \times V_2\\V_2=\frac{131.394}{5.50} \\V_2 = 23.89 \,mL

Therefore,

Volume of HCl required will be 23.89 mL.

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6 0
2 years ago
Before the development of electrophoresis to separate macromolecules, ____________ was used.
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High-speed centrifugation employs centrifugal force to separate particles with various densities or masses suspended in a liquid. High-speed rotation of the solution inside the tube causes each particle's angular momentum to experience centrifugal forces inversely proportionate to its mass.

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