Question #c8464

Question

Question #c8464

1 Answer

Impact of this question

7607 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-07-27T13:05:05

$10. g$ $"10. g"$

Explanation:

You can go from moles of sodium hydroxide, $NaOH$ $"NaOH"$ , to grams of sodium hydroxide by using a conversion factor called molar mass.

The molar mass tells you the mass of exactly one mole of a given substance. In this case, sodium hydroxide has a molar mass of ${39.997 g mol}^{- 1}$ $"39.997 g mol"^(-1)$ , which implies that one mole of sodium hydroxide has a mass of $39.997 g$ $"39.997 g"$ .

You can thus use the molar mass of sodium hydroxide to calculate how many grams you'd get in $0.25$ $0.25$ moles of this compound

$0.25 moles NaOH \cdot \frac{39.997 g}{1 mole NaOH} = ∣ ∣ ∣ ∣ ¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯ \frac{a}{a} 10. g \frac{a}{a} ∣ ∣ - ------- -$ $0.25 color(red)(cancel(color(black)("moles NaOH"))) * "39.997 g"/(1color(red)(cancel(color(black)("mole NaOH")))) = color(green)(|bar(ul(color(white)(a/a)color(black)("10. g")color(white)(a/a)|)))$

The answer is rounded to two sig figs, the number of sig figs you have for the number of moles of sodium hydroxide.

Science

Math

Humanities

... and beyond

Question #c8464

1 Answer

Explanation:

Related questions

Impact of this question