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cluponka [151]
3 years ago
11

A compound that is composed of only carbon and hydrogen contains 85.7% c and 14.3% h by mass. what is the empirical formula of t

he compound?
Chemistry
1 answer:
Anna35 [415]3 years ago
8 0
The empirical formula is CH2
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If 75 grams of oxygen react, how many grams of aluminum are required?
german

Answer:

84.24 g

Explanation:

Given data:

Mass of oxygen = 75 g

Mass of Al required to react = ?

Solution:

Chemical equation:

4Al + 3O₂     →   2Al₂O₃

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 75 g/ 32 g/mol

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Now we will compare the moles of oxygen with Al.

                          O₂         :          Al

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                        2.34        :         4/3×2.34 = 3.12 mol

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Mass = 3.12 mol × 27 g/mol

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5 0
3 years ago
When aqueous solutions of NH4OH(aq) and CuCl2(aq) are mixed, the products are NH4Cl(aq) and Cu(OH)2(s). What is the net ionic eq
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Answer:

2OH^-(aq) + Cu^2+(aq) -----> Cu(OH)2(s)

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The net ionic equation usually shows the main ionic reaction that goes in the system. The other ions that do not participate in this net ionic equation are called spectator ions. Spectator ions do not participate in the main reaction occurring in the system.

The net ionic equation quite often result in the formation of a solid precipitate in the system such as Cu(OH)2.

The net ionic equation for this reaction is;

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Explanation:

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Which part of an of the helium atom is positively charged
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