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Gnoma [55]
3 years ago
13

Can someone help me to answer the questions 8 and 9

Chemistry
1 answer:
Elena-2011 [213]3 years ago
3 0
Idk it's stupid do it yourself
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2Al(s) + Fe2O3(s) → Al2O3(s) + 2Fe(s) T
brilliants [131]

Answer:

ΔHrxn = [(1) -1675.5 ( kJ/mole) + (2) 0 ( kJ/mole)] - [(1) -824.3 ( kJ/mole) + (2) 0 ( kJ/mole)]

Explanation:

ΔHrxn = 2ΔHf (Al₂O₃)  - ΔHf (Fe₂O₃)

Remember that for pure elements in their standard state of temperature and pressure by definition their standard heats of formation are zero.

ΔHrxn = 2(-1675.7) - (-824.3) kJ/mol

ΔHrxn = 2527 kJ/mol

6 0
3 years ago
Which types of clouds are bright white ad fluffy,sometimes forming shapes or pictures?
lawyer [7]
The answer is cumulus. 

Stratus clouds often low and sometimes confused for fog. Cirrus clouds are thin and wispy.
4 0
3 years ago
Magnetism is an example of a property of what?
Setler79 [48]

Answer:

A) behavior

Explanation:

6 0
3 years ago
What is the relationship between a cell and an organism?
alukav5142 [94]

Answer:

100%

Explanation:

Cell is the structural and functional unit of life. Without Cell, an organism can never be created.

6 0
2 years ago
Read 2 more answers
Please help y’all I don’t understand
ycow [4]

Answer:

Both atoms achieve a more stable configuration

Explanation:

3 0
2 years ago
Read 2 more answers
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