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An #0.025*mol# quantity of hydrogen gas was collected from the reaction of sodium metal with water. What molar quantity of sodium was used?

Answer 1

Serenity Allen

#0.05*molxx22.99*g*mol^-1# of sodium metal were reacted.

Regarding the response,

#Na(s) + H_2O(l) rarr 1/2H_2(g)uarr + NaOH(aq)#,

A predetermined molar quantity of reactant was provided to us.

As stated in the introduction, we just multiply the number of moles by the molar mass to get the mass.

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Answer 2

Naomi Aronson

0.025 mol of hydrogen gas collected from the reaction of sodium metal with water corresponds to 0.025 mol of sodium used in the reaction.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.