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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 isotope has 45 protons and 57 neutrons

anastassius [24]

…Answer:

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2 years ago

Which mathematical relationship should you use to convert moles of a substance into grams?

pav-90 [236]

Answer:

Explanation:

The equation for this conversion is $Mass = \frac{Moles}{Mr}$

Mr is molar mass.

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3 years ago

Ionic equation: Zn(NO3)2 (aq)+ K2S (aq) ------> ZnS (s) + 2KNO3 (aq)

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Potassium nitrate does not have a net ionic equation. It is because potassium nitrate is not soluble and does not produce precipitates. The net ionic reaction is going to be Zn2+ + S2- -> ZnS(s). Zinc sulfide precipitates in the net ionic reaction.

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3 years ago

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I Bleached my white shirt for the first time yesterday. I thought it would get the stain out but it turned the spot yellow. Why?

Alex17521 [72]

Answer:

The base layer of the shirt ( ORIGINAL COLOR) before dyed white was most likely yellow so the bleach lightened the colors to their original form

Explanation:

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3 years ago

Which set of work should be used to solve the following problem?

VladimirAG [237]

Answer:

C. 65.5 g PF3 x (1 mole / 87.97 g PF3)

Explanation:

Dimensional analysis can be used to find the amount of moles in 65.5 grams of PF3 gas.

First we would need to determine relevant conversions.

We would need to find the molar mass of PF3 which is already given ( 87.97 g / mol )

So 1 mole of PF3 = 87.97g

From there we can create the dimensional analysis table which will look something like the attached image.

This table correspond with answer choice C.

Reasons it's not the other answer choices.

It wouldn't be A because the units must cancel out and they don't as grams is being multiplied by grams

It would be B because it doesn't use correct units.

There are not 87.97 moles in 1 gram of PF3. There are 87.97 grams in 1 mole of PF3

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2 years ago