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evablogger [386]
3 years ago
6

How many valence electrons does aluminum (Al) have available for bonding? 1 2 3 4

Chemistry
1 answer:
ludmilkaskok [199]3 years ago
7 0

Answer: three

Explanation: Al has only three elections available for bonding

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If a compound has a composition of 82% nitrogen and 18% hydrogen, what is the empirical formula for this compound
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Answer: The empirical formula for the given compound is NH_3

Explanation : Given,

Percentage of H = 18 %

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Let the mass of compound be 100 g. So, percentages given are taken as mass.

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To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of Hydrogen = \frac{\text{Given mass of Hydrogen}}{\text{Molar mass of Hydrogen}}=\frac{18g}{1g/mole}=18moles

Moles of Nitrogen = \frac{\text{Given mass of nitrogen}}{\text{Molar mass of nitrogen}}=\frac{82g}{14g/mole}=5.8moles

Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 5.8 moles.

For Hydrogen  = \frac{18}{5.8}=3.10\approx 3

For Nitrogen = \frac{5.8}{5.8}=1

Step 3: Taking the mole ratio as their subscripts.

The ratio of H : N = 3 : 1

Hence, the empirical formula for the given compound is NH_3

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