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Umnica [9.8K]
2 years ago
5

Things that are too small (or too large) to see can be studied with models

Chemistry
2 answers:
MakcuM [25]2 years ago
8 0

Answer:

Things that are too small (or too large) to see can be studied with models

True

Usimov [2.4K]2 years ago
7 0

Answer:

True

Explanation: The limitations of our size compared to our research subject can be overcome by building models of the subject under question. Models can be smaller versions of things to large to recreate (planets, planes, etc.) or too small to see (molecular structures, insects, etc.)

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If sufficient acid is used to react completely
Juli2301 [7.4K]

Solution,

Mass of Mg - 21gm

molar mass of Mg - 24gm

moles = Given mass/ Molar mass

moles = 21/24 = 0.875

1 mole of Mg produce 1 mole of H2 gas

so 0.875 mole of Mg will produce 0.875 moles of H2 gas

One mole of H2 gas = 22.4 litre

0.875 mole of H2 gas = 0.875×22.4

0.875 mole of H2 gas = 19.60 litre

So the nearest ANSWER is Option four 19.37 litre.

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