3 years ago

Please help some one I’ve been trying this all day and it’s due in 5 min

1 answer:

8 0

Answer:

1st box = compound

2nd box = pure compound

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scoundrel [369]

Answer:

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2 years ago

fredd [130]

Answer:

Explanation:

One mole is the amount of substance that contain the Avogadro number which is equal to 6.022×10^23 atom, molecules or ions.

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2 years ago

Nikitich [7]

Answer: high iridium levels in a 66- million-year-old clay layer in Denmark and Italy

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3 years ago

pentagon [3]

We are given with the mass of Arsine ( $AsH_{3}$

The mass of arsine is 15g

there is a relation between moles, mass and molar mass of any compound which is

$moles=\frac{mass}{molarmass}$

The molar mass of Arsine = atomic mass of As + 3X atomic mass of H

the molar mass of Arsine = 74.92 + 3X 1 = 77.92 g/mol

Let us calculate the moles as

$moles=\frac{15}{77.92}=0.192mol$

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3 years ago

alex41 [277]

I believe the answer is a because 2 times 12 is 24. Hope this helped

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3 years ago