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Svetradugi [14.3K]
3 years ago
8

Why is it important to start at the zero mark of a ruler/meterstick + triple beam balance when making measurements?

Chemistry
1 answer:
sergeinik [125]3 years ago
3 0
Because if you start at one for example you starting at a extra cm/m/mm. So when you get your measurement result it will be wrong by just one cm/m/mm. Hope this wasn't too confusing.
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The misture can be separated by filtration.

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4 years ago
How many electrons in an atom could have these sets of quantum numbers n=7 l=3 ml=-1?
zysi [14]

Solution:

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How many grams of C2H6 are needed to react with 54 grams of O2?
Dmitrij [34]

Answer:

Explanation:

in a combustion of ethane 2 moles of ethane react with 7 moles of O2

now no of moles in 54 gram of O2=mass/ molar mass

moles =54/32=1.7 moles

if 7 moles of O2 required 2 moles of ethane then 1.7 mole required=?

7 moles of O2=2 moles of C2H6

1.7 moles of O2=1.7*2/7=0.5 moles of C2H6

0.5 moles of C2H6 contain how much grams=?

mass= moles*molar mass=0.5*30=15

4 0
3 years ago
Convert 15.6 cm to m
Olin [163]
There is 100 centimeters in 1 meter


Divide 15.6 with 100

15.6/100 = 0.156

0.156 meters is your answer

hope this helps
4 0
3 years ago
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