Question

1. students in a biochemistry lab at the local university are investigating the effects of ibuprofen on the gut. they decide to test the following hypothesis on a group of 1,000 mice: as the amount of ibuprofen increases, the amount of stomach acid produced by the mice will also increase. given this hypothesis, identify the independent and dependent variables in their investigation. (2 pts) 24. outline how the biochemistry students from #23 should set up their investigation in order to get the most precise and accurate results. be sure to clearly identify the experimental and control groups, as well as at least 2 constants they will need to consider. (3 pts) 25. explain the important roles that both control groups and constants play in designing an experiment. (2 pts) 26. use the graph to the right to answer the following questions. (6 pts) a. find the number of grams of sugar that dissolve in 100 grams of water at 80°c. b. identify the independent and dependent variables in the graph. c. identify the solute and solvent. d. define solubility. concept 2: 27. write the following numbers in scientific notation: (4 pts) a. 78,700,000,000 b. 0.0099

Explanation:

23.

The independent variable is what is changed, and the dependent is what is measured in response. Here, the amount of ibuprofen is manipulated, and the amount of stomach - acid is measured.

The experimental group gets the treatment (ibuprofen), the control group doesn't. Constants like diet and age of mice are important for accurate results.

Control groups provide a baseline for comparison, and constants ensure that only the independent variable affects the dependent variable.

Answer:

Independent variable: Amount of ibuprofen.
Dependent variable: Amount of stomach acid produced by the mice.

24.