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Mnenie [13.5K]
3 years ago
6

The average American student is in class for 330minutes/day. How many hours/day is this?

Chemistry
2 answers:
yKpoI14uk [10]3 years ago
5 0
In one day the average american student is in class for 5.5 hours and inone week they are in class 1 day and 3.5 hours
o-na [289]3 years ago
4 0
1 hour = 60 minutes
Set up a ratio:
(330 min / x hours) = (60 min / 1 hour)
x = (330×1)÷60
x = 5.5 hours
To check:
5.5 hours × 60 = 330 minutes
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So first thing to do in these types of problems is write out your chemical reaction and balance it:

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The theoretical yield would be the assumption that 100% of the magnesium will be converted into Magnesium Oxide, so you would get, based on the first equation, .0172 mol of MgO. Multiplying this by the molecular weight of MgO (24.305+16) gives us .693 g of MgO.

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