Astudent determines the molar mass of a compound by the method used in this experiment. she found the temperature of the ice water to be 1.0°c. when she added 11.1g of her unknown solute to the mixture, the temperature fell to -3.0°c. the mass of the solution was 90.4g. calculate mass of solute in solution 1kg of water

139.94 grams of solute is present in  kilograms of water

Explanation:

Temperature of the ice water = T = 1.0°C

Temperature of the mixture = =-3.0°C

Depression in freezing point

=1.0°C-( -3.0°C)=4°C

m = molality of the solution

= Molal depression constant

Mole of solute = 0.1705 moles

Mass of solute = 11.1 g

Moles of solute =

Molar mass of the solute= M

M = 65.088 g/mol

Molality of the solution = m =

g of solute /kg of water

139.94 grams of solute is present in  kilograms of water

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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