The correct answer here would be mole, as this is the unit of
measurement used to determine the amount of a substance being used. This
particular measurement is usually used during chemistry experiments as
it determines how many representative particles there are in any one
amount of substance.
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The answer is to your question "How many meters is 50 cm?" is 0.5m
A lichen is an organism that results from a mutualistic relationship between a fungus and a photosynthetic organism. The other organism is usually a cyanobacterium or green alga. The fungus grows around the bacterial or algal cells.
No, the answer is false.
A salad would be an example of a mixture, as it is a blend of tomatoes and lettuce.
A salad would be considered a heterogeneous mixture (you can see its different components).