Sodium Oxide (Na20) can react with hydrochloric acid (HCI) to produce sodium chloride (NaCl) and water (H20) according to the
following equation:
Na2O + 2HCI -> 2NaCl + H20
How many total atoms are present before
the reaction?
2 before and 2 after
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B)
3 before and 3 after
Eliminate
o
5 before and 5 after
7 before and 7 after

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 kelvin and 1.21 atmospheres? 2 li (s) + 2 h2o (l) yields 2 lioh (aq) + h2 (g)

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.