A 1.25 g sample of aluminum is reacted with 3.28 g of copper (II) sulfate. How much aluminum sulfate is produced? 2A1() + 3CuSO4(aq) → Al2(SO4)3(aq) + 3Cu(s)

A. 7.92 g Al2(SO4)3
B. 4.42 g Al2(SO4)3
C. 1.3 g Al2(SO4)3
D. 2.34 g Al2(SO4)3

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Why do oxygen have a strong attractive force for electrons