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NemiM [27]
3 years ago
15

How does the addition of salt to solid ice affect the melting transition from solid to liquid?

Chemistry
2 answers:
serious [3.7K]3 years ago
7 0

Answer:

Im sure the answer is c

Hope this helped have a good day :) please mark me the brainliest answer?

Vadim26 [7]3 years ago
4 0
<h2>Answer:</h2>

The water would need to <u>B. absorb less energy during the plateau in order to melt</u>.  

<h2>Explanation:</h2>

Salt when added to ice lowers the freezing point of the ice. So, if ice is added to the solid ice it doesn't let it to freeze rather the temperature of water may fall but it won't freeze.

For melting, it needs less energy after adding salt because salt itself absorbs the energy from the surroundings to help the phase transition of water from solid to liquid.

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A solution is made from ethanol, C2H5OH and water is 0.75 m. How many grams of ethanol are contained per 250. g of water?
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Answer:

m_{solute}=8.6g

Explanation:

Hello,

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

m=\frac{n_{solute}}{m_{solvent}}

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:

m_{solvent}=250g*\frac{1kg}{1000g} =0.25kg

Then, we solve for the moles of the solute:

n_{solute}=0.75\frac{mol}{kg}*0.25kg =0.19mol

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

m_{solute}=0.19*\frac{46g}{1mol} \\\\m_{solute}=8.6g

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