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Topic: Who can help me with a problem?  (Read 696 times)

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Offline denispopescu0

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Who can help me with a problem?
« on: December 02, 2020, 01:20:51 AM »
A mixture of magnesium and magnesium oxide with a mass of 65g reacted with concentrated nitric acid after the reaction gave off a brown gas with a volume of 56l (c.n) Determines the mass parts of magnesium and magnesium oxide in the initial mixture. Please

Offline billnotgatez

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Re: Who can help me with a problem?
« Reply #1 on: December 02, 2020, 01:24:58 AM »
You have to show your attempts or thoughts at solving the question to receive help.
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Offline denispopescu0

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Re: Who can help me with a problem?
« Reply #2 on: December 02, 2020, 02:09:48 AM »
please i need this fast

Offline sharbeldam

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Re: Who can help me with a problem?
« Reply #3 on: December 02, 2020, 02:16:18 AM »
was it really that hard to understand the mod's post?
and now you are basically saying you need help in an exam... which is worse.

Is it so hard to comply to the rules of this site?
O-Chem 1+2 Online Free tutor on Skype: Live:damnitsjake21

Offline AWK

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Re: Who can help me with a problem?
« Reply #4 on: December 02, 2020, 02:51:15 AM »
This is a typical task in general chemistry textbooks. Each such task begins with writing balanced reaction equations for each component separately, and on the basis of the stoichiometry of the equations, algebraic equations are prepared. At the level of general chemistry, the task is solved even without a calculator.
But at the level of normal chemistry, the task is unrealistic for a number of reasons: Mg reacts with HNO3 differently than, for example, Cu; the task does not take into account the NO2 ::equil::N2O4 balance (this is only a simplification that does not take into account the reduction of nitrogen oxides); under STP conditions, N2O4 is a volatile liquid. Fortunately, the problem can be solved assuming that only NO2 or only N2O4 is formed.
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