For question #17, 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

15.3 cos 65 degrees trig

not moving. pos accel,

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!