Achemist needs to create a series of standard cu2 (aq) solutions for an absorbance experiment. for the first standard, he uses a pipet to transfer 25.00 ml of a 2.96 m cu2 (aq) stock solution to a 250.0 ml volumetric flask and adds enough water to dilute to the mark. he then uses a second pipet to transfer 20.00 ml of the second solution to a 100.0 ml volumetric flask and adds enough water to dilute to the mark. calculate the concentration of the cu2 (aq) solution in the 100.0 ml volumetric flask.

The concentration of the Cu2 in the 100.0 ml volumetric flask is 0.0592 M

Explanation:

In the first dilution, Cu2 was diluted ten times (25 / 250 = 1/10). Then, this dilution was diluted again, but now five times (20 / 100 = 1/5). In total, the solution was diluted 50 times (1/10 * 1/5 = 1/50). The final concentration will be 2.96 M / 50 = 0.0592 M

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.