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bekas [8.4K]
3 years ago
8

Solid sodium reacts violently with water producing heat, hydrogen gas and sodium hydroxide. How many molecules of hydrogen gas a

re produced when 65.4 g of sodium are added to water?
2 Na(s) +2 H2O(l) -- > 2 NaOH(aq) + H2(g)

Show all work.

Chemistry
2 answers:
nignag [31]3 years ago
4 0
Find the number of moles of sodium you have: 
<span>n = m/M where m is your 20g of sodium and M is 22.99 g/mol. </span>

<span>Look at the stoichiometry of the equation - it's 2:2 when you are producing NaOH. So if you took 1 mole of Na, it'd produce 1 mole of NaOH (as the ratio is equal). </span>

<span>That means that your moles of sodium is equal to the moles of NaOH produced. Use the molar mass of NaOH - which is 39.998 g/mol along with your calculated number of moles to get the mass (the formula rearranges to m = nM). </span>

<span>This figure is the theoretical yield - what you would get if every last mole of sodium was converted into NaOH. </span>

<span>What you get in practice is the experminetal yield, and the percentage yield is the experimental yield divided by the theoretical yield - and then multiplied by 100%.</span>
sergeinik [125]3 years ago
3 0
Hope it helped you.

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<h3>Calculation of Molecular formula and empirical formula:-</h3>

Vinegar has three elements:

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