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Mila [183]
3 years ago
6

It is found when an unknown solid solute is dissolved in water that the solubility of the solid increases if temperature is decr

eased. What can be determined about the entropy and enthalpy of the dissolution of this unknown solid? not enough information to make a determination entropy is increased, exothermic entropy is decreased, exothermic entropy is increased,endothermic entropy is decreased, endothermic
Chemistry
1 answer:
mina [271]3 years ago
5 0

Answer:

exothermic entropy is increased

Explanation:

An exothermic process is one whose rate increases when the temperature is decreased. Hence if a decrease in temperature favours the dissolution of more solute at equilibrium, then the process is exothermic.

Similarly, the dissolution of a solute in a solvent increases the disorderliness (entropy) of the system because of the increase in the number of particles present. Hence once a solute in dissolved, the entropy of the system increases.

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What is the texture and appearance of oil
alexgriva [62]

Explanation:

yellow and slick

8 0
4 years ago
A 29.00 mL sample of an unknown H3PO4 solution is titrated with a 0.130 M NaOH solution. The equivalence point is reached when 2
beks73 [17]
I am first assuming that you want the molarity of the acid. Use the formula M_{a} V_{a} = M_{b}V_{b} which is the titration formula. M is molarity (a is of acid and b is of base) and V is volume in mL (a is of acid and b is of base).  Plugging in gives us (29 mL)(M_{a}) = (0.130 M)(27.73 mL). Solving gives us M_{a} = 0.124 M
6 0
3 years ago
HELPP!<br> how many grams are in 1.50 x 10(24) atoms of copper?
svlad2 [7]

Answer:

2266g

Explanation:

mass = no.of molecules /6.o23*1o(23) * molar mass

molar mass of co2= 44g /mol

1.5 .10^25/6.023 .10^23 =51.5 moles of co2

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4 0
3 years ago
Which base NH4OH or Ba(OH)2 required more H2SO4 to reach neutralization ?
Olin [163]

Answer:

Ba(OH)₂ requires more H₂SO₄ to reach neutralization..

Explanation:

  • At neutralization, acid neutralize base to form salt and water at equivalence.

  • For NH₄OH:
  • NH₄OH is neutralized by H₂SO₄ according to the reaction:

<em>2NH₄OH + H₂SO₄ → (NH₄)₂SO₄ + 2H₂O.</em>

<em></em>

It is clear that every 2 mol of NH₄OH need 1 mol of H₂SO₄ to be neutralized.

  • For Ba(OH)₂:
  • Ba(OH)₂ is neutralized by H₂SO₄ according to the reaction:

<em>Ba(OH)₂ + H₂SO₄ → BaSO₄ + 2H₂O.</em>

<em></em>

It is clear that every 1 mol of NH₄OH needs 1 mol of H₂SO₄ to be neutralized.

<em>So, Ba(OH)₂ requires more H₂SO₄ to reach neutralization.</em>

<em></em>

5 0
3 years ago
17.The column that an element is located in tells us
krok68 [10]

Answer:

A. the total number of valence electrons an atom has.

Explanation:

The columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties.

4 0
3 years ago
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