Question #8ef20

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Answer 1 · 2017-09-20T00:02:07

$"7.85 g"$

All you have to do here is to use the fact that

$color(blue)(ul(color(black)("1 dag = 10 g")))$

In other words, you need $10$ grams in order to have $1$ decagram.

To convert your sample to grams, set up this conversion factor by adding decagrams as the denominator and grams as the numerator.

You will end up with

$0.785 color(red)(cancel(color(black)("dag"))) * "10 g"/(1color(red)(cancel(color(black)("dag")))) = color(darkgreen)(ul(color(black)("7.85 g")))$

The answer must retain the number of sig figs you have for your measurement.