27.calculate the change in freezing point when 116.8 grams of barium chloride are added to 250 grams of water. kf = 1.86°c/m; kb = 0.512°c/m
a. -4.17°c
b. -12.5°c
c. -8.35°c
d. 0°c

Freezing point depression, ΔT, is calculated using the formula:

ΔT= - Kf * molal

Where molal is the molality of the solute (moles solute/kg solvent)

In this case the solute is Barium Chloride while the solvent is Water. The formula for molality is:

molal = (mass of solute / molar mass solute) / (mass of solvent)

molal = (116.8 g / 208.23 g/mol) / (0.25 kg Water) = 

molal= 2.24 mol/kg = 2.24 m

Substituting to the 1st equation:

ΔT= - 1.86 °C/m (2.24 m)

ΔT= -4.17 °C

So the answer is A.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

thats a little if u want the answer just look it up on google thats what i do haha : )