Which type of substances have chemical bonds that are not directional and valence electrons that move freely between the atoms?

2 answers:

5 0

I believe the correct answer from the choices listed above is option C. The type of substances that has chemical bonds that are not directional and valence electrons that move freely between the atoms are metals. Hope this answers the question. Have a nice day.

Ket [755]3 years ago

5 0

Answer:

c) metals

Explanation:

In metallic bonding there are delocalized electrons that are shared by a number of metal cations. The electrons are free to move and are not confined to a single metal cation. These free flowing electrons give metals its specific properties such as ductility, malleability, electrical conductivity and more.

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When 74.8g of alanine C3H7NO2 are dissolved in 1450.g of a certain mystery liquid X, the freezing point of the solution is 8.30°

dlinn [17]

Answer: The mass of potassium bromide that must be dissolved in the same mass of X to produce the same depression in freezing point is 58.2 grams

Explanation:

Depression in freezing point is given by:

$\Delta T_f=i\times K_f\times m$

$\Delta T_f=T_f^0-T_f=8.30^0C$ = Depression in freezing point

i= vant hoff factor = 1 (for non electrolyte)

$K_f$ = freezing point constant =

m= molality = $\frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}=\frac{74.8g\times 1000}{1450g\times 89.09g/mol}=0.579$