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Leto [7]
2 years ago
7

In the modern periodic table, which of the following represents the last pair of elects for which Newlands' Law of Octaves would

hold true?
1. AI and GA
2. AI and SI
3. NE and AR
4. MG and CA
Chemistry
1 answer:
Paladinen [302]2 years ago
3 0

Answer: Mg and Ca

Explanation:

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Which of the four substances listed will dissolve in water and why?
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Answer:

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7 0
3 years ago
1) How many moles are in 4.0x10^24 atoms?
-Dominant- [34]

Answer:

<h2>6.64 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4 \times  {10}^{24} }{6.02 \times  {10}^{23} }   \\  = 6.644518...

We have the final answer as

<h3>6.64 moles</h3>

Hope this helps you

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True:

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