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KATRIN_1 [288]
2 years ago
12

For parts of the free-response question that require calculations, clearly show the method used and the steps involved in arrivi

ng at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate.
PbI2(s)⇄Pb2+(aq)+2I−(aq)Ksp=7×10−9
The dissolution of PbI2(s) is represented above.
Write a mathematical expression that can be used to determine the value of S, the molar solubility of PbI2(s). (Do not do any numerical calculations.)
Chemistry
1 answer:
SVETLANKA909090 [29]2 years ago
6 0

The molar solubility of lead II iodide is 1.21 × 10^-3 M.

<h3>What is solubility product?</h3>

The term solubility product refers to the equilibrium constant that shows the extent to which a substance is dissolved in water. For the dissolution of lead II iodide we can write;

PbI2(s) ⇄ Pb^2+(aq) + 2I^-(aq)

Hence;

Ksp = [x] [2x]^2 = 4x^3

x = ∛Ksp/4

x  = ∛7 × 10^-9/4

x = 1.21 × 10^-3 M

Learn more about solubility product: brainly.com/question/857770

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Calculate the volume in cm^3 of 325.0 dg of alcohol. Alcohol has a density of 0.785g/mL.
Masteriza [31]
Answer:
106 mL

Explanation:
In order to be able to answer this question, you must understand what the density of a substance tells you.
The density of a substance is nothing more than the mass of that substance that occupies one unit of volume.
In your case, the density of ethanol is given in Grams per milliliter, which means that one unit of volume will be
1 mL
.
So, ethanol has a density of
0.785 g mL
−
1
, which is equivalent to saying that if you take exactly
1 mL
of ethanol and weigh it, you will end up with a mass of
0.785 g
.
Now, you know that the volume you're using has a mass of
83.3 g
. Well, if you get
0.785 g
for every
1 mL
of ethanol, it follows that this much mass will correspond to a volume of
83.3
g ethanol
⋅
ethanol's density

1 mL
0.785
g ethanol
=
106.11 mL
Rounded to three sig figs, the answer will be
V
ethanol
=
106 mL



Hope this helps
5 0
3 years ago
Which of the compounds, c3h8, mgcl2, zn(no3)2, ocl2, are expected to exist as molecules?
fenix001 [56]
The answer is C3H8 and OCl2  they are molecular compounds. MgCl2 is an ionic compound while Zn(NO3)2 is an inorganic chemical compound. 
Molecular compounds are covalent compounds in which the elements share electrons via covalent bonds. They are inorganic compounds that take the form of discrete molecules, for example water and carbon dioxide.
4 0
3 years ago
Read 2 more answers
28.
OlgaM077 [116]

Answer:

i don't know

Explanation:

4 0
2 years ago
A higher than normal high tide is called
alina1380 [7]
It is called a spring tide
8 0
3 years ago
Consider 80.0-g samples of two different compounds consisting of only carbon and oxygen. One of the compounds consists of 21.8 g
goldenfox [79]

Answer:

  • <u><em>Ratio of the  mass carbon that combines with 1.00 g of oxygen in compound 2 to the mass of carbon that combines with 1.00 g of oxygen in compound 1 = 2</em></u>

Explanation:

First, detemine the mass of oxygen in the two samples by difference:

  • mass of oxygen = mass of sample - mass of carbon

Item                     Compound 1                        Compound 2

Sample                80.0 g                                    80.0 g

Carbon                 21.8 g                                    34.3 g

Oxygen:               80.0 g - 21.8g = 58.2 g         80.0 g - 34.3 g = 45.7 g

Second, determine the ratios of the masses of carbon that combine with 1.00 g of oxygen:

  • For each sample, divide the mass of carbon by the mass of oxygen determined above:

Sample              Mass of carbon that combines with 1.00 g of oxygen            

Compound 1      21.8 g / 58.2 g =  0.375

Compound 2     34.3 g / 45.7 g = 0.751

Third, determine the ratio of the masses of carbon between the two compounds.

  • Divide the greater number by the smaller number:

  • Ratio = 0.751 / 0.375 = 2.00 which in whole numbers is 2
6 0
3 years ago
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