Question

1. These values were obtained as the mass of products from the same reaction: 8.83 g;
8.84 g; 8.82 g. The known mass of products from that reaction is 8.60 g. The values
are:
accurate
precise
both precise and accurate
neither precise nor accurate
0

Answer 1

Answer:

precise

Explanation:

precise because they are almost the same measurement over and over ( remember in significant digits the last number is considered to be an estimate on measurements). The known value, 8.60 g, is pretty far from the measurements taken so it cant be accurate.

Answer 2

The values obtained in the measurement of the mass of products from the same reaction are precise but not accurate.

Recall that:

• Precision refers to the closeness of repeated measurements made on the same variable
• Accuracy refers to the proximity of a measurement to its true, predetermined value.

In this case, one can see that the repeated measurements of the mass of the products were close to each other with a range of 0.02 g.

The average of the measurement can be calculated such that:

                       8.83 + 8.84 + 8.82/3 = 8.83 g

The predetermined mass of products from the reaction is 8.60 g. The difference from the average measurement can be calculated as:

                         8.60 - 8.83 = 0.23

The difference between the measurement and true value is significant. thus, the result is not accurate.

More on precision and accuracy can be found here: https://brainly.com/question/18974348