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stiv31 [10]
3 years ago
6

At one time in the Earth’s history, many people thought the world was flat. Which best explains why the model of the Earth is no

w round?
Chemistry
1 answer:
GenaCL600 [577]3 years ago
5 0

Answer:

<u>Models are limited by science - the more that was discovered, the better the model could be made.</u>

Explanation:

Models in science are meant to represent things in science. Since science controls the reliability of a model, when science changes, so does the model. Otherwise the model would be pseudoscientific.

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A solution has a pH of 12. Is it considered an
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Base

Explanation:

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If 6 g of element k combine with 17 g of element l, how many grams of element k combine with 85 g of element l?
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3 years ago
Determine the number of moles of C5H12 that are contained in 357.4 g of the compound.
AlladinOne [14]

Answer: 4.96 moles

Explanation:

C5H12 is the chemical formula for pentane, the fifth member of the alkane family.

Given that,

number of moles of C5H12 = ?

Mass in grams = 357.4 g

Molar mass of C5H12 = ?

To get the molar mass of C5H12, use the atomic mass of carbon = 12g; and Hydrogen = 1g

i.e C5H12 = (12 x 5) + (1 x 12)

= 60g + 12g

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Now, apply the formula

Number of moles = Mass / molar mass

Number of moles = 357.4g / 72g/mol

= 4.96 moles

Thus, 4.96 moles of C5H12 that are contained in 357.4 g of the compound.

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Which wave would have the higher pitch?<br><br> A or B
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A would have a higher pitch
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