read the scales of this balance.
the unknown sample has a mass of:
a.) 1.012 kg
b.) 1.220 g
c.) 11.2 g
d.) 1.200 g

D.1.200 g

Step-by-step explanation:

We are given that unknown sample

We have to find the mass of unknown sample by reading the scales of given balance.

On first scale , reading=0 g

On second scale, reading=1g

On third scale, reading=0.2 g

Total mass=0+1+0.2=1.2 g

1.2 g can be written as 1.200 g because after decimal point when we write zeroes then it does not effect value of given number.

Hence, option D is true.

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )