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user31782
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20 votes
4 answers
13k views

How many Ga atoms are connected to one As atom in solid gallium arsenide?

11 votes
1 answer
21k views

Why is oxygen absorbed in a colorless alkaline solution of pyrogallol and why does it turn dark brown?

8 votes
3 answers
17k views

The Crisscross method for finding the chemical formula

6 votes
1 answer
2k views

How does molecular collision excites the electron?

6 votes
2 answers
1k views

Why does water condense on grass and iron grills in cold weather?

4 votes
1 answer
12k views

How much CO2 is produced in burning of a candle?

4 votes
2 answers
5k views

Is "propanol" a correct name in IUPAC nomenclature?

4 votes
1 answer
5k views

Why does attraction always cause release of energy making the system more stable?

1 vote
2 answers
6k views

Is melting of Tar for road construction a reversible change?

0 votes
1 answer
957 views

Why does mixing inks make subractive colors?