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Anika [276]
3 years ago
11

How many elements and atoms are in marble

Chemistry
1 answer:
DochEvi [55]3 years ago
7 0

Answer:

Explanation:

Scientists know that there are 6x1023 molecules in a mole - so we have about 0.5x1023 molecules in our marble…and since every silicon dioxide molecule has one atom of silicon and two of oxygen, we have a grand total of 1.5x1023 atoms. That's 150,000,000,000,000,000,000,000 atoms

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Which statement describes J.J. Thomson’s plum-pudding model of the atom?
ra1l [238]
Option C: the electrons are embedded in a positive sphere.

As we know that was a wrong model and nowadays the electrons are considered to be around the nucleus, in regions called orbitals.
4 0
3 years ago
Fossil fuels are considered to be __________ resources because they are consumed ___________ than they form.
mixas84 [53]

Fossil fuels are formed by the deposition of organic matter. It is a nonrenewable resource as they deplete faster as they are produced. Thus, option B is correct.

<h3>What is non-renewable resources?</h3><h3 />

A non-renewable resource is exhaustible and takes a longer time to get produced as they include the accumulation of organic matter over thousands of years.

Fossil fuels take a very long time to get replenished and have a slower rate of formation as compared to consumption. It includes petrol, coal, diesel, natural gases, etc.

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8 0
1 year ago
When 200g water goes from a temperature 10C to 40C, is heat absorbed or released?
gayaneshka [121]

how would it be possible to even be absorbed?? the answer is released.

8 0
4 years ago
How many moles of sulfate ions are in a sample of aluminum sulfate in which the number of formula units is 7.534 × 1023?
valentina_108 [34]

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7 0
3 years ago
Ethanol (C2H5OH) is produced from the fermentation of sucrose in the presence of enzymes.
madam [21]

actual yield of ethanol = 305.0g

molar mass of sucrose = 342g

molar mass of ethanol  =46g

mass of sucrose = 665g

mole of sucrose = mass / molar mass = 665/342

mole of sucrose =1.9 mole

sucrose :  C2H5OH

       1      :  4

     1.9     : 1.9x4 =7.6 mole of C2H5OH are formed

mass (therotical yield ) of C2H5OH= mole x mass

mass (therotical yield ) of C2H5OH= 7.6 x 46 = 349.6g

percent yields of ethanol =  actual /therotical x100

=305/349.6x100 = 87.24 %

6 0
3 years ago
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