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lesantik [10]
3 years ago
13

HELP HELP PLEASE EXTRA POINTS WILL B GIVEN HELP ANSWER THESE PLS

Biology
1 answer:
Oksana_A [137]3 years ago
6 0
1- 4 Na + O2 —> 2 Na2O
2 - 4H2 +2O2 —-> 4H2O
3- Na2SO4 + CaCl2 —> CaSO4 + 2NaCl
4- 2Al2O3–> 4Al+ 3O2
5- N2 +3 H2–> 2 NH3
6- 3Fe +4 H20–> Fe3O4 + 4H2
I’m having trouble reading the last ones .
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Answer:

The third and the fourth option.

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Explanation:

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