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3 years ago

Butterfly, Squid, Scallop, Slug And Which Of These Animals Is Most Likely To Form A Fossil

Chemistry

2 answers:

Bingel [31]3 years ago

8 0

Probably a scallop because their shells will make more of an imprint or fossil in the dirt or substance!

aev [14]3 years ago

8 0

I would say scallop because of it's hard, protective shell :)

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A sample weighing 3.110 g is a mixture of Fe 2 O 3 (molar mass = 159.69 g/mol) and Al 2 O 3 (molar mass = 101.96 g/mol). When he

grandymaker [24]

Answer:

The mass fraction of ferric oxide in the original sample : $\frac{723}{3110}$

Explanation:

Mass of the mixture = 3.110 g

Mass of $Fe_2O_3=x$

Mass of $Al_2O_3=y$

After heating the mixture it allowed to react with hydrogen gas in which all the ferric oxide reacted to form metallic iron and water vapors where as aluminum oxide did not react.

$Fe_2O_3(s)+3H_2(g)\rightarrow 2Fe(s)+3H_2O(g)$

Mass of mixture left after all the ferric oxide has reacted = 2.387 g

Mass of mixture left after all the ferric oxide has reacted = y

$x=3.110 g- y=3.110 g - 2.387 g = 0.723 g$

The mass fraction of ferric oxide in the original sample :

$\frac{0.723 g}{3.110 g}=\frac{723}{3110}$

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3 years ago

HELLPPP PLZZ ASAPP!

Sphinxa [80]

Answer:

Condensation and Depositon

Explanation:

Condensation is from gas to liquid

Deposition is from gas to solid

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3 years ago

Farmers leave dead plants in their fields in the soil conservation method called _____________?

Marina CMI [18]

I think the answer is conservation plowing. I hoped helped!

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Question 19 Unsaved

aliina [53]

It described a nucleus surrounded by a large volume of space.

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PLEASE POINTS!!!!!

Vinil7 [7]

Density = mass divided by volume
Density = 8.2 divided by 24.5
Density = 0.33g/cm3

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