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Lapatulllka [165]
3 years ago
13

Write a balanced chemical equation for the standard formation reaction of solid sodium orthosilicate

Chemistry
2 answers:
Mumz [18]3 years ago
8 0
Equation for the standard formation of solid sodium orthosilicate:
4 Na(s) + Si(s) + 2 O₂(g) → Na₄SiO₄(s)
Brums [2.3K]3 years ago
3 0

Answer : Si_{(s)} + 4NaOH_{(aq)}---> Na_{4}SiO_{4}_{(s)} + 2H_{2}_{(g)}

Explanation :

Silicon in presence of aqueous sodium hydroxide undergoes single displacement/replacement reaction and forms solid sodium orthosilicate which is a stable compound.

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One thing is the scale.  Nobody has an accurate picture of the scale in
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Book ... It's getting late, Hillary's fading, and that's all I can think of.
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3 0
3 years ago
How many 20.0-g ice cubes are required to absorb 47.0 kJ from a glass of water upon melting?
Sati [7]

Hello!


The number of 20-g ice cubes required to absorb 47 kJ from a glass of water upon melting is 7 icecubes


Why?


We are going to clear from the equation of the released heat, the mass of ice (m). The specific latent heat of fusion of ice is 336 kJ/kg:


Q=m*L\\ \\ m=\frac{Q}{L}=\frac{47 kJ}{336 kJ/kg}=0,1399 kg=139,88 g\\   \\ 139,88g*\frac{1 icecube}{20g}=6,99=7icecubes


So, 7 ice cubes are required to absorb that amount of heat from the glass of water.


Have a nice day!

3 0
3 years ago
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