Answer:
A chemical property of iron is that it is capable of combining with oxygen to form iron oxide, the chemical name of rust. The more general term for rusting and other similar processes is corrosion. Other terms that are commonly used in descriptions of chemical changes are burn, rot, explode, decompose, and ferment.
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C. Particles stick to them
Answer:
Convection
Explanation:
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Answer:
Ok I'm not sure If I'm going to know the answers of the question but I'm going to try my best to help you
(total mark/number of subjects)×100=63
(total mark+20+2)/(number of subjects)×100=65
(total mark+22)/number of subjects=0.65
let n be the total number of subjects
((0.63 of 100n)+22)÷(100n)=0.65
because he obtained only 63 percent from sum of all marks.(marks counted from 100)
(0.63×100n+22)÷(100n)=0.65
0.63+(22÷100n)=0.65
0.22÷n=0.65-0.63
0.22÷n=0.02
n=0.22/0.02
n=11
there were 11 subjects