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harkovskaia [24]
3 years ago
6

Which of the following type of rock formation is the LEAST likely to contain a fossil?

Chemistry
2 answers:
VikaD [51]3 years ago
5 0

Answer:

Granite

Explanation:

Fossil is a well preserved remains  or traces of plant and animals. Fossil are found in various kind of rock. Usually in rocks that can create the necessary environment to conserve life. Rocks that has vital nutrient and conducive environment to nurture life contain fossils.  

Granite is the only rocks least likely among the option that can harbor life and invariably contain fossil due to the mode of formation. Granite is an intrusive igneous rocks . Granite is formed from a molten liquid called magma .This magma solidify below the earth surface to form granite. The temperature were this rock form is usually high and it rarely support life. Plant and animal cannot strife in the kind of environment that  produce granite because of the temperature therefore if this creature cannot live their, the remains can hardly be found.

Generally, granite cannot preserve fossils.

kipiarov [429]3 years ago
4 0
Some types of rocks are more likely than others to hold fossils. Limestone, shale<span>, and sandstone may have fossils in them. The answer is Granite.</span>
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The percentages of KBr and KI  in the sample by mass is 80.68 and 19.32 % respectively.

<h3>What is Molar Mass ?</h3>

Molar mass is defined as the mass contained in 1 mole of sample.

It is given that

the sample has a total mass of 5.76 g contains KBr and KI

and contains 1.79 gm of K is present

what is the percentage of KBr and KI in the sample

Molecular weight of K = 39

Molecular weight of Br = 79.9

Molecular weight of I = 126.9

In KBr the mass percentage of K is 39/(39+79.9) = 32.89%

In KI the mass percentage of K is 39/(39+126.9) = 23.5%

Let the mass of KBr present in the sample is x

K will be 0.3289 x

and let the mass of KI present be y

K will be 0.235y

x +y =5.76

0.3289x+0.235y = 1.79

0.0939y = 0.1045

y = 1.1125 gm

x = 5.76-1.1125

x = 4.6475 gm

% of KBr = (4.6475/5.76  )*100 = 80.68 %

% of KI = (1.1125/5.76) *100 = 19.32%

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Describe how you would prepare 500.0mL of an aqueous solution that is 30.0% isopropyl alcohol by volume
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Explanation:

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∴ Volume of the solute = (the volume% of a solution)(volume of the solution)/100 = (30.0%)(500.0 mL)/100 = 150.0 mL.

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