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2 years ago

Your cotton T-shirt smells when you take it out of the clothes dryer. Explain why.

Chemistry

1 answer:

Kaylis [27]2 years ago

3 0

Answer:

When the T-shirt comes out of the clothes dryer, it is so warm that molecules from the detergent and fabric soft ener are likely to have changed phase and become gases. When they reach your nose, you are able to smell them.

Explanation:

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What do the elements in each pair have in common?

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The elements in each pair have in common it that they are metaloids

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3 years ago

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The impact that the oil spill has is environmental impacts.

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3 years ago

Keiko needs 100mL of a 5% acid solution for a science experiment. She has available a 1% solution and a 6% solution. How many mi

4vir4ik [10]

Answer:

Keiko should mix 20 mL 1% solution and 80 mL 6% solution for to make 100 mL 5% solution

Explanation:

There are 2 unknown values X= mL 6% solution and Y=1% solution. So, we need 2 equations:

1. Equation acid concentration. X mL 6% + Y mL 1% = 100 mL 5%

2. Equation solvent concentration X mL 94% + Y mL 99% = 100 mL 95%

When clearing X and Y :

(X mL 6% + Y mL 1% = 100 mL 5%) (-15,7)

X mL 94% + Y mL 99% = 100 mL 95%

_______________________________

- Y 0.83 = 16.5

Y = 19.9 mL 1% solution

Replace Y in anyone equation and X = 80 mL 6% solution

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3 years ago

Read 2 more answers

36g of an alloy of copper and zinc contains 45% copper. how much pure copper do you need to add in order to get a 60% copper all

iogann1982 [59]

First, you need to count copper mass in alloy.
Second, you have to make an equation an find x ( the copper mass must be added). The answer is: 13,5g pure copper

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3 years ago

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

Agata [3.3K]

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

<u>Explanation:</u>

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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3 years ago