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2 years ago

Which two chemists organized elements based on properties

Chemistry

1 answer:

UNO [17]2 years ago

3 0

Answer: Dmitri Mendeleev and Henry Moseley

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How are the scientific method and the engineering method similar?

aliya0001 [1]

The answer is B

Explanation: Not D because only engineering does that
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2 years ago

How can chemical weathering make it easier for mechanical weathering to occur ? MY EXAMS!!!

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Mechanical weathering breaks rocks into many pieces creating more surface area for chemical weathering

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2 years ago

How many hydrogen bonds can CH3NH2 make to water?

ikadub [295]

CH3NH2 can only have as many hydrogen bonds as hydrogen bonding sites in the molecule. CH3NH2 has two N−H bonds and a lone pair of electrons on the nitrogen atom. Therefore, CH3NH2 can form three hydrogen bonds with water.

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2 years ago

Explain that : how we explore different between Licl and Nacl

Leona [35]

Answer:

See the explanation below, please.

Explanation:

In the bunsen burner, the gas and air inlet can be regulated manually. In the case of metals (such as lithium and sodium in this case) they contain an electron in the latter in its external electronic configuration. They are characterized by transferring electrons easily and produce the emission of light when excited, producing flames of different colors in the lighter (orange for sodium and red / scarlet for lithium)

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2 years ago

Calculate the number of moles in the following: 2.8 X 10^24 atoms of Cl2

vova2212 [387]

Answer:

<h3>The answer is 4.65 moles</h3>

Explanation:

To find the number of moles 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

N = 2.8 × 10²⁴ atoms of Cl2

So we have

$n = \frac{2.8 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 4.65116279069...$

We have the final answer as

<h3>4.65 moles</h3>

Hope this helps you

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2 years ago