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Phoenix [80]
3 years ago
7

For the reaction C2H5OH + O2 --> 3CO2 + 3H2O

Chemistry
1 answer:
Lelechka [254]3 years ago
8 0
The reaction given above is a combustion reaction. All combustion reactions are exothermic, meaning they give off heat when they react,
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It is a physical change.

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3 years ago
Chemistry - please help!!​
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describe the general trend in electronegativity as metals in group 2 on the periodic table are concidered in order of increasing
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3 years ago
If 42.8 mL of 0.204 M HCl solution is needed to neutralize a solution of Ca(OH)2, how many grams of Ca(OH)2 must be in the solut
Aneli [31]

Hey There!

At neutralisation moles of H⁺ from HCl  = moles of OH⁻ from Ca(OH)2  so :

0.204 * 42.8 / 1000  => 0.0087312 moles

Moles of Ca(OH)2 :

2 HCl + Ca(OH)2 = CaCl2 + 2 H2O

0.0087312 / 2 => 0.0043656 moles (  since each Ca(OH)2 ives 2 OH⁻ ions )

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Molar mass Ca(OH)2 = 74.1 g/mol

mass = moles of Ca(OH)2 * molar mass

mass =  0.0043656 * 74.1

mass = 0.32 g of Ca(OH)2


Hope that helps!

6 0
3 years ago
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