Include in your answer:
-foam is a colloid.
-colloids include gas dispersed in a liquid.
-colloids include gas dispersed in a solid.
Answer:
Al is oxidized while Ag is reduced.
Explanation:
The complete molecular equation is;
3Ag2S + 2Al --> 6Ag + Al2S3
Oxidation half equation;
2Al ------> 2Al^3+ + 6e
Reduction half equation;
6Ag^+ + 6e -------> 6Ag
Overall redox reaction equation;
2Al + 6Ag^+ ----->2Al^3+ + 6Ag
Hence; Al is oxidized while Ag is reduced.
Answer: 0.1 km
Explanation:
1) Multiply the rate (speed) by the time: 2 cm / year × 5,000 year = 10,000 cm
2) Convert cm to km, using these well know conversion factors:
1 km = 1,000 m
1 m = 100 cm
⇒ 10,000 cm × [1 m / 100 cm] × [1 km / 1,000 m] = 0.1 km