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2 years ago

How is energy transferred when objects are in contact A. Conduction B. Convection C. latent heat D. Radiation

1 answer:

7 0

Your answer is conduction, If there is a difference in temperature between two objects, energy is transferred from the hotter object to the cooler one. ... Energy can be transferred from a hot object to a cooler one.

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Decreasing the temperature of a reaction decreases the reaction rate because

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The answer u are looking for is b

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3 years ago

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When 61.6 g of alanine (C3H7NO2) are dissolved in 1150. g of a certain mystery liquid X, the freezing point of the solution is 2

MrRissso [65]

Answer:

Explanation:

From the given information:

TO start with the molarity of the solution:

$= \dfrac{61.6 \ g \times \dfrac{1 \ mol \ C_3H_7 NO_3}{89.1 \ g} }{1150 \ g \times \dfrac{1 \ kg}{1000 \g }}$

= 0.601 mol/kg

= 0.601 m

At the freezing point, the depression of the solution is $\Delta \ T_f = T_{solvent}- T_{solution}$

$\Delta \ T_f = 2.9 ^0 \ C$

Using the depression in freezing point, the molar depression constant of the solvent $K_f = \dfrac{\Delta T_f}{m}$

$K_f = \dfrac{2.9 ^0 \ C}{0.601 \ m}$

$K_f = 4.82 ^0 C / m}$

The freezing point of the solution $\Delta T_f = T_{solvent} - T_{solution}$

$\Delta T_f = 7.3^ 0 \ C$

The molality of the solution is:

$= \dfrac{61.6 \ g \times \dfrac{1 \ mol \ NH_4Cl}{53.5 \ g} }{1150 \ g \times \dfrac{1 \ kg}{1000 \g }}$

Molar depression constant of solvent X, $K_f = 4.82 ^0 \ C/m$

Hence, using the elevation in boiling point;

the Vant'Hoff factor $i = \dfrac{\Delta T_f}{k_f \times m}$

$i = \dfrac{7.3 \ ^0 \ C}{4.82 ^0 \ C/m \times 1.00 \ m}$

$\mathbf {i = 1.51 }$

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2 years ago

The most condensed state of matter is <br> A. solid<br> B. liquid <br> C. gas <br> D. plasma

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The most condensed state of matter is A. Solid Matter

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Convert the volume to its equivalent in milliliters. 14 μL= ? mL

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0.014 is the answer

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Is milk a solution, colloid, suspension, or a compound?

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Milk is a colloid system

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3 years ago

How is energy transferred when objects are in contact A. Conduction B. Convection C. latent heat D. Radiation​

How is energy transferred when objects are in contact A. Conduction B. Convection C. latent heat D. Radiation