Answer:

Explanation:
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In this case, the unit of concentration is molality which is defined by:

Whereas the mass of the solvent is measured in kilograms. In such a way, with the given data, we first compute the kilograms of water:

Then, we solve for the moles of the solute:

Finally since the molar mass of ethanol is 46 g/mol, we compute the grams for the given solution:

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when sodium metal is dropped in water, hydrogen gas in liberated due to extreme heat released as the reaction is exothermic, gas catches fire.
Through hemoglobin transport in blood, material exchange is carried out on the alveolar membrane.