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Maru [420]
4 years ago
12

Given the balanced equation:

Chemistry
1 answer:
Rina8888 [55]4 years ago
4 0
As a sample of 12 (s) sublimes to 12 (g), the entropy of the sample Increases because the particles are more randomly arranged.
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Given the unbalanced equation below, answer the following: Calculate the number of liters of 3.00 M lead (II) iodide solution pr
mr_godi [17]

The number of liters of 3.00 M lead (II) iodide : 0.277 L

<h3>Further explanation</h3>

Reaction(balanced)

Pb(NO₃)₂(aq) + 2KI(aq) → 2KNO₃(aq) + PbI₂(s)

moles of KI = 1.66

From the equation, mol ratio of KI : PbI₂ = 2 : 1, so mol PbI₂ :

\tt \dfrac{1}{2}\times 1.66=0.83

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

\large \boxed {\bold {M ~ = ~ \dfrac {n} {V}}}

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So the number of liters(V) of 3.00 M lead (II) iodide-PbI₂ (n=0.83, M=3):

\tt V=\dfrac{n}{M}\\\\V=\dfrac{0.83}{3}\\\\V=0.277~L

5 0
3 years ago
Two substances each have a temperature of 23 degrees Celcius. After they are combined the temperature rises to 27 degrees Celciu
Sidana [21]

well it has cause a thermal reaction which causes the temperature to rise so by mixing those together we get the reaction you have the temp. rose  

4 0
3 years ago
What is the molarity of a solution composed of 4.73 g of potassium iodide (KI) dissolved in enough water to make 0.169 L of solu
Kazeer [188]

Answer:

[KI] = 0.17 M

Explanation:

We determine the moles of solute:

Mass / Molar mass → 4.73 g / 166 g/mol = 0.0285 moles

Molarity (mol/L) is defined as moles of solute in 1L of solution

It is a sort of concentration

M = 0.0285 mol / 0.169L = 0.17 M

Instead of making the division (mol/L), we can also try this rule of three:

In 0.169 L we have 0.0285 moles of solute

in 1 L we must have ___ (1 . 0.0285) / 0.169 = 0.17 mol/L

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3 years ago
Select all that apply. Select all the items that are public goods or services.
Gekata [30.6K]
All of them are technically a public good or a service because for a public goods it would be all and service it would be all so.... yah
4 0
4 years ago
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Is condensation of ethanol a physical change or a chemical change
tigry1 [53]

Answer: Physical change

Explanation: Condensation is the phase change of a gas to the liquid state. There is no formation of new products so it does not undergoes chemical change. Any phase change is considered a physical change.

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