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Firdavs [7]
3 years ago
13

11. Contrast the following: • Mixture: • Compound: • Element:

Chemistry
1 answer:
Nikitich [7]3 years ago
6 0
Mixture is physical, compound is chemical, and a element is the base version
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Answer: 56.5 J

Explanation:

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The role of sodium hydroxide in the synthesis of a chalcone is to
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Explanation:

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A solid piece of aluminum (51.0 g) was added to a solution of sodium hydroxide (84.1 g) in water, A balanced equation for this r
EastWind [94]
M_{Al}=26,98\frac{g}{mol}\\
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n=\frac{m}{M_{Al}}=\frac{51g}{26,97\frac{g}{mol}}\approx1,89mol\\\\\\
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m=84,1g\\\\
n=\frac{m}{M_{NaOH}}=\frac{84,1g}{39,4\frac{g}{mol}}\approx2,14mol

<span>2 NaOH(aq)+ 2 Al(s)+ 2 H</span>₂<span>O → 2 NaAlO</span>₂<span>(aq)+ 3 H</span>₂<span>(g)
</span>  2mol      :     2mol           :                                  3mol
2,14mol   :     1,89mol      :                                  2,835mol
remains         completely consumed
2,14-1,89=0,25mol


A) Al

B)  

M_{NaOH}=39,4\frac{g}{mol}\\&#10;n=0,25mol \Rightarrow \ \ \ m=n*M_{NaOH}=0,25mol*39,4\frac{g}{mol}=9,85g

C)
n=2,835mol\\&#10;M_{H_{2}}=2,02\frac{g}{mol} \Rightarrow \ \ \ m=n*M_{H_{2}}=2,835mol*2,02\frac{g}{mol} \approx 5,73g

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Colloids and suspension are described as ________ heterogeneous _________ mixtures
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As the mass of an object increases, what happens to the gravitational force created by that object?
alexandr1967 [171]

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4 0
3 years ago
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