Date: /
Eg. no
9.
20 gram of 40%
ca
pure
+6
(034 .
reacted with
cacl2, H₂o and
5 gm of HCL
co
uced
Find which
one is limiting reagent
Calculate mass of-cacha formed
lla
maraton

Use examples from the article to explain one positive and one negative effect that chemistry has had on society

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.