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A chemist analyzed a sample of unknown substance and found that it contains 55% carbon, 9.17% of hydrogen and the rest of the mass is oxygen. What is the percentage by mass of oxygen in the sample?
answered
Jan 22
in
Analytical Chemistry
0
votes
64
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Compare the biological and environmental factors that contribute to human development.
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Jan 20
in
Psychology
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42
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How does the theory of attention relate to driving?
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Jan 20
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Psychology
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25
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When was the first experimental demonstration of operant conditioning?
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Jan 20
in
Psychology
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37
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What is behavioural psychology?
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Jan 14
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Psychology
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36
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In machines that increase force, such as ramps and doorknobs and nutcrackers, what is the relation between output and input force?
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Dec 31, 2024
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Science
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11
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Helium-3 is produced by beta decay of a certain what?
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Dec 30, 2024
in
Science
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29
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An ecosystem consists of all the living things and what?
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Dec 30, 2024
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Science
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