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Shalnov [3]
3 years ago
8

You leave a piece of bread outside for a few days. It forms green and blue mold. It smells awful. A chemical change has occurred

– True or False?
Explain with facts
Chemistry
2 answers:
Juli2301 [7.4K]3 years ago
8 0

Answer:

False

Explanation:

It is a physical change because the molecules of the bread didn't change, only the form did.

Fed [463]3 years ago
3 0

False. It is a physical change because the molecules of the bread didn't change only the form of the bread changed.

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Hey there!

Volume in mL :

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Density = 0.921 g/mL

Therefore:

Mass = density * Volume

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Which type of reaction produces the most dangerous radioactive waste?
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Explanation:

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The United States has about which percentage of the world's coal reserves?
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You are given a solution that is 518 mM lactose. You need to make up 4.5 L of 16.7 mM solution. What volume do you need to trans
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Answer:

The volume you need to transfer from the stock solution is 0.145 l

Explanation:

Since the number of moles of lactose in the volume of stock solution that you transfer will be the same as the number of moles of lactose in the final solution, you can use this expression:

number of moles in volume to transfer = number of moles in the final solution

Since number of moles = concentration * volume (if the concentration is expressed in molarity), then:

Ci * Vi = Cf * Vf

where:

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Vi = volume of the stock solution to be transferred.

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Then, replacing with the data:

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