2021*1.A chemist weighed an object and found its mass to be 225 grams. The object’s actual mass is 250 grams. What was the chemist’s percent error? Hint: observed- actual x 100 ​

To find the percent error, we use this formula:

P

%

=

∣

∣

∣

e

−

t

t

∣

∣

∣

⋅

100

, where

P

%

is the percent error,

e

is the experimental or calculated value and

t

is the theoretical or known value.

http://astro.physics.uiowa.edu/ITU/glossary/percent-error-formula/

We have 2 known values, so plug them in to get

P

%

=

∣

∣

∣

250

−

240

240

∣

∣

∣

⋅

100

P

%

=

∣

∣

∣

10

240

∣

∣

∣

⋅

100

P

%

=

∣

∣

∣

1

24

∣

∣

∣

⋅

100

P

%

=

100

24

P

%

≈

4.1

¯

6

, therefore the percentage error is roughly 4.1

¯

6

percent.

I hope I helped!