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Alexxx [7]
3 years ago
14

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 you answer stating facts that support your answer.

Chemistry
1 answer:
NeX [460]3 years ago
4 0

Answer:

False

Explanation:

It is not a chemical change, it is a physical change because the molecules of the bread didn't  change, the form of the bread did

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Vera_Pavlovna [14]

Answer:

"Subsoil" is the correct answer.

Explanation:

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If you have 8.56 g of H2, how many grams of NH3 can be produced?
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4 0
3 years ago
Which sample of co2 has a definite shape and definite volume
Kisachek [45]
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The density of liquid mercury is 13.69 g/cm^3. How many atoms of mercury are in a 15.0 cm^3 sample? Use "E" for "x10" and use si
balu736 [363]
The formula is  m = D x V
D = <span>13.69 g/cm^3.
</span>V = <span>15.0 cm^3 
the mass of the liquid mercury is m= </span>13.69 g/cm^3 x 15.0 cm^3 = 195g
the molar mass of Hg is 200,
1 mole of Hg = 200g Hg, so #mole of Hg= 195 / 200 = 0.97 mol
but we know that
 1 mole  = 6.022 E23 atoms
0.97 mole=?

6.022 E23 atoms x 0.97 / 1 mole = 5.84 E23 atoms
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Lostsunrise [7]
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7 0
3 years ago
Read 2 more answers
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