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2 years ago

2

Chemistry

2 answers:

stepladder [879]2 years ago

7 0

Answer: Sharp spines and waxy stems

Dominik [7]2 years ago

6 0

Sharp spines because it keeps predators away and it’s skin helps keep in water

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The solubility product of PbI2 is 7.9x10^-9. What is the molar solubility of PbI2 in distilled water?

Agata [3.3K]

Answer: The molar solubility of $PbI_2$ is $1.25\times 10^{-3}mol/L$

Explanation:

Solubility is defined as the maximum amount of solute that can be dissolved in a solvent at equilibrium.

Solubility product is defined as the product of concentration of ions present in a solution each raised to the power its stoichiometric ratio.

The balanced equilibrium reaction for the ionization of calcium fluoride follows:

$PbI_2\rightleftharpoons Pb^{2+}+2I^-$

s 2s

The expression for solubility constant for this reaction will be:

$K_{sp}=[Pb^{2+}][I^-]^2$

We are given:

$K_{sp}=7.9\times 10^{-9}$

Putting values in above equation, we get:

$7.9\times 10^{-9}=(s)\times (2s)^2\\\\7.9\times 10^{-9}=4s^3\\\\s=1.25\times 10^{-3}mol/L$

Hence, the molar solubility of $PbI_2$ is $1.25\times 10^{-3}mol/L$

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2 years ago

How many gallon are there in 85.00 L?

DerKrebs [107]

Answer:

22.46

Explanation:

.There are 3.79 liters in one gallon

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The only nonmetal in Group 14 is A carbon. B. oxygen. C. nitrogen. D. fluorine.

lesantik [10]

Answer:

carbon

Explanation:

i just googled it

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Write a conclusion statement that addresses the following questions:

Sindrei [870]

Answer:

did you ever get the answer lol

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2 years ago

Why is stoichiometry is used in cooking?

labwork [276]

Answer:

Explanation:

stoichiometry is used in cooking because it helps you determine the amount or proportion of compounds you will need in a chemical reaction. Stoichiometry is present in daily life, even in the cooking recipes we make at home. The reactions depend on the compounds involved and how much of each compound is needed to determine the product that will result.

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3 years ago