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shepuryov [24]
2 years ago
14

Order the list of Earth’s water resources from greatest to least: Rivers; Ocean water (salt); Ice Caps/glaciers; Groundwater

Chemistry
2 answers:
Volgvan2 years ago
8 0
Ground, ice caps/glacier, the ocean.
Alex2 years ago
4 0
Ice caps yeah (why the hell do i need to write 20 letters)
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Caffeine has the molecular formula, C8H10N4O2. What is the percent composition of caffeine?
Debora [2.8K]

Answer:

b) 49.48% C, 5.19% H, 28.85% N, and 16.48% O

Explanation:

we find the mass for each element in one mole by multiplying the number of atoms in one molecule with the atomic mass

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by adding the masses together we find the molar mass of the molecule

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we apply the rule of threes to find the percentage of each element

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100g....a...........b...........c.............d

a=(100*96)/194=49.48%C

b=(100*10)/194=5.19%H

c=(100*56)/194=28.85%N

d=(100*32)/194=16.48%O

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