What mass is associated with a #1/2*mol# quantity of sodium hydroxide?

Answer 1

Well........#"sodium hydroxide"# has a molar mass of #40.0*g*mol^-1#

And thus if we have a #1/2*mol# of #"caustic soda"#, we have a mass of..........

#1/2*cancel(mol)xx40*g*cancel(mol^-1)=??g#

The product provides us with an answer in units of mass, which is what we wanted. This is a check on my calculations and a built-in detection of potential errors on my part in framing the problem. Take note of the answer's DIMENSIONAL consistency.

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Answer 2

Peyton Adams

The molar mass of sodium hydroxide (NaOH) is approximately 40.00 grams per mole. Therefore, 1/2 mole of sodium hydroxide would have a mass of approximately 20.00 grams.

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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.