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aliina [53]
2 years ago
10

Which essential urban need was met by this structure

SAT
2 answers:
IgorLugansk [536]2 years ago
8 0

Answer:

<h2><u>Clean water</u></h2>

Explanation:

<em>Hope this helps :} </em>

<em>Pls make brainliest :P</em>

<em>And have an amazing day <3</em>

jeka57 [31]2 years ago
6 0

Answer:

Through this building, people in roman empire able to obtain water from the resources that located outside of their empire and provide necessary nutrients for their crop to grow. The clean water was also used to support various other Roman economic sector, such as gardens, mining, blacksmith, animal husbandry, etc.

Explanation:

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How many moles of silver atoms are there in 1. 8 x 1020 atoms of silver?.
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Answer:

Taking into account the definition of avogadro's number, 1.8×10²⁰ atoms of silver are in 2.98×10⁻⁴ moles of silver.

First, you have to know that it is called Avogadro's Number or Avogadro's Constant. By Avogadro's number it is understood the number of elementary entities (that is, of atoms, electrons, ions, molecules) that exist in a mole of any substance. Its value is 6.023×10²³ particles per mole.

Avogadro's number represents a quantity without an associated physical dimension, so it is considered a pure number that allows describing a physical characteristic without an explicit dimension or unit of expression.

Avogadro's number applies to any substance.

Then you can apply the following rule of three: if 6.023×10²³ atoms are contained in 1 mole of silver, then 1.8×10²⁰ atoms are contained in how many moles of silver?

amount of moles of silver= (1.8×10²⁰ atoms × 1 mole)÷ 6.023×10²³ atoms

amount of moles of silver= 2.98×10⁻⁴ moles

Finally, 1.8×10²⁰ atoms of silver are in 2.98×10⁻⁴ moles of silver.

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