11. which picture(s) would best represent a rock? explain why.
12. if measurements of a gas are 100l and 300 kilopascals and then the gas is measured a second time and found to be 75l, describe what had to happen to the pressure (if temperature remained constant). include which law supports this observation. no calculations are required! (page 449)
matching: place the name of the scientist in the blank next to their ideas about the atom. (page 492)
democritus, thompson, rutherford, bohr
. he said that all positive charges were found in the central nucleus.
. he theorized that electrons were imbedded in the positive sphere, like a chocolate chip cookie.
. he believed electrons were in fixed orbits.
. he named the atom.
for question #12, use the following picture:
17. what element is this? how do you know? (page 495 and periodic table pages 500-501)
for questions 18-21, use the information on pages 590-592 and page 567. in each space, classify the reaction type.
18. 2libr + pb(no3) - pbbr2 + 2lino3
19. fe + 2hcl - fecl2 + h2
20. cao + h2o - ca(oh)2
21. nicl2 - ni + cl2. (the minus sign are meant to be arrows.
for questions 22 – 24, write an equation for the reaction of hydrogen chloride and sodium sulfide to produce hydrogen sulfide with sodium chloride. (page 582 and page 567-568)
22. show the formulas of the reactants.
23. show the formulas of the products.