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3 years ago

12

Choose an element from the Group that will lose 2 electrons in order to achieve noble gas configuration? What is the group name

for that element?

1 answer:

Lady bird [3.3K]3 years ago

6 0

If it will lose 2 electrons to achieve noble gas configuration, then it must be in group 2A, which is the alkaline earth metals.

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4 years ago

The heat of solution is found by adding a salt to water in a calorimeter and measuring the temperature change. The specific heat

melomori [17]

Answer:

The heat of the solution of salt is 1.66.11 J/g.

Explanation:

Mass of the water = m = 46.52 g

Initial temperature of the water = $T_1=22.83 ^oC$

Final temperature of the water = $T_2=18.98^oC$

The specific heat of water, c = 4.180 J/gºC

Heat associated with water on dissolving salt: q

$Q=mc(T_2-T_1)$

$Q=46.52 g\times 4.180 J/g&oC\times (18.98^oC-22.83 ^oC)$

$Q=-748.65 J$

Negative sign means that heat was lost by water on an addition of a salt.

Heat released on dissolving of salt = -Q = 748.65 J

Mass of salt added = 4.5069 g

Heat of the solution of salt :

= $\frac{-Q}{ 4.5069 g}=\frac{748.65 J}{ 4.5069 g}=1.66.11 J/g$

The heat of the solution of salt is 1.66.11 J/g.

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4 years ago