Left over is 456 minus total of A+B+C
456-334=122
C d are equal so 122/2=61
Answer: 9.70%
Step-by-step explanation:
The formula to find the percentage error is given by :-

Given : Actual mass of zinc oxide used by pharmacist = 28.35 g
Estimated mass of zinc oxide used by pharmacist =31.1 g
Now, 
i.e. 
i.e. 
Hence, the percentage of error on the basis of the desired quantity.= 9.70%
0.04 is ten times more than 0.004
Answer:
it's B
Step-by-step explanation:
because I did this