A shovel lifts 4.56 kg of dirt from the ground 3.29 m into the air. How much work does the shovel do on the dirt? A.
1.38 x 10^0 J

B.
1.47 x 10^2 J

C.
1.36 x 10^1 J

D.
1.50 x 10^1 J

Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3

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.

Amixture with the same composition throughout is!