Well, figures for efficiency vary a lot, but according to Bicycling Science it’s lubrication that matters most – lubing a dry chain can add 5% to the efficiency.
More interestingly (and I hadn’t read this bit in the book before) it varys a lot depending on gear ratio – bottom gear (22-28) is 99% efficient, top gear (42-11) is 88%. That’s a big difference
Answer: a compound is a substance that is made up of more than one type of atoms bonded together, mixtures are a mix of multiple elements or compounds which haven't bonded together.
Explanation:
Answer:
0.6425 moles of 
is required to react with 25.7 grams of 
.
Explanation:
mas of oxygen gas = 25.7 g
moles of oxygengas = 
According to reaction given above, 5 moles of oxygen gas reacts with 4 moles of ammonia gas.
Then 0.8031 moles of oxygen gas will react with :
of ammonia gas
0.6425 moles of is required to react with 25.7 grams of .
<span>greater dispersion forces is in fact correct</span>
Electrons - each atom has its own unique #
