Answered

1.) The actual density of iron is 7.874 g/mL. In a laboratory investigation, Jason finds the density of a piece of iron to be 7.921 g/mL.


What is the percent error that is associated with Jason's measurement?

A-4.7 %
B-0.6%
C0.6%
D4.7%

2.) Rob measures the solubility of three different salts in water at 22celsius


Which type of graph should he use to display his data?

Abar graph

B)line graph

Chistogram

D)scatter plot


only answer if you really know plz.

Verified Answer :

Answer 1: The percentage error associated with Jason's measurement is 0.6%.

Explanation:

Experimental value of density if iron = 7.921 g/mL

Actual value of density of iron = 7.874 g/mL

\(\% error=|\frac{\text{Experimental value}-\text{Actual value}}{\text{Actual value}}|\times 100\)

\(=|\frac{7.921-7.874}{7.874}|\times 100=0.59\%\approx 0.6\%\)

Hence, the correct  an option is (C).

Answer 2: The correct answer is bar graph.

Explanation:

In order to express the solubility of three different  salt in water at 22 ° C  graphically Rob must use bar graph. By keeping the solubility on vertical axis and and bars of different salt on horizontal axis with their heights respective their solubility values. Hence, the correct answer is option (A).

As shown in an image attached.



View image IlaMends

Answer:

C B

Explanation:

Related Questions