I have a B.S. in Chemistry from the University of Cincinnati and an M.S. in Curriculum and Instruction from Purdue University. I have been teaching chemistry full time for eight years. I have also taught the following courses: Chemistry 2, AP Chemistry, Physics, Anatomy, Zoology, 8th grade science.
Organize Create a chart that compares physical and chemical properties. Givetwo examples for each type of proper.
Use the data in the table to answer the following questions. How many grams of bromine reacted? How many grams of compound were formed?
Challenge 106.5 g of HCl(g) react with an unknown amount of $\mathrm{NH}_{3}(\mathrm{g})$ to produce 157.5 $\mathrm{g}$ of $\mathrm{NH}_{4} \mathrm{Cl}(\mathrm{s})$ . How many grams of $\mathrm{NH}_{3}(\mathrm{g})$ reacted? Is the law of conservation ofmass observed in the reaction? Justify your answer.
Describe the results of a physical change and list three examples of physicalchange.
If 3.5 $\mathrm{g}$ of element $\mathrm{X}$ reacts with 10.5 $\mathrm{g}$ of element $\mathrm{Y}$ to form thecompound $\mathrm{XY},$ what is the percent by mass of element $\mathrm{X}$ in thecompound? The percent by mass of element $\mathrm{Y}$ ?
Challenge All you know about two unknown compounds is that theyhave the same percent by mass of carbon. With only this information,can you be sure the two compounds are the same? Explain.
