(Based on PS 1.2)A sample with a mass of 21.78340 g is weighed using an electronic balance that is accurate to ± 0.2 mg. How many significant figures should you write down in your lab book if you were doing an experiment and weighed the sample with this balance?

How many grams of chloride are in 153g of calcium chloride? [grams]   What is the percent weight of chloride in calcium chloride? [weight] %

(Based on PS 1.3)How many neutrons are in the nucleus of an atom of the most common isotope of chromium?

(Based on ME 2)Choose the alkaline earth metal with the smallest first ionization energy:

9. It’s totally fine to reuse an old paper from a previous course.

3. The evaluation procedures, or grading method for this course, is a straight average of all of your grades.

4. There is a Research Paper Assignment in this course that constitutes a large chunk of your overall grade.

7. There is a course schedule inside the syllabus where your professor lists a detailed schedule of what will be happening every session of the semester along with all of your due dates and exam dates.

“Race is far from being the only significant marker of group difference—class, gender, sexuality, religion, and citizenship status all matter greatly in the United States.” Who is the author of this statement?

Choose 1 of the following to answer (DO NOT ANSWER BOTH):  List 3 characteristics of modern birds and specifically explain how those characteristics adapt birds for flight. List 3 differences between the skeletons of mammals compared to amphibians and specifically explain how those characteristics are adaptive.