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WINSTONCH [101]
2 years ago
6

The process of determining the composition of a sample by conducting chemical tests is called qualitative analysis.

Chemistry
1 answer:
Vilka [71]2 years ago
7 0
I think it’s actually called an ElementaI analysis, so this would be false, hope this helps.
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The complete balanced chemical equation is: 
4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g) 

In statement form: 4mol NH3 reacts with 5 mol O2 to produce 6 mol H2O 

First let us find for the limiting reactant: 
>molar mass NH3 = 17 g/mol 
moles NH3 = 54/17 = 3.18 mol NH3 
This will react with 3.18*5/4 = 3.97 mol O2 

>molar mass O2 = 32g/mol 
moles O2 = 54/32 = 1.69 mol O2 
We have insufficient O2 therefore this is the limiting reactant 

From the balanced equation: 
For every 5.0 mol O2, we get 6.0 mol H2O, therefore

moles H2O formed =  1.69 mol O2  * 6/5 = 2.025 mol
Molar mass H2O = 18g/mol 
<span>mass H2O formed = 2.025*18 = 36.45 grams H2O produced</span>

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3 years ago
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The answer is 21 years.

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7×3

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How many grams of water can be produced when 11.7 moles of ethane (C2H6) react with excess oxygen gas?
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Mass of water= 35.1\times 18g/mol= 631.8 g

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3 years ago
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