You add 31.65 g of a non-electrolyte solute to 220.0 mL of water to cook Mac and Cheese. How much hotter will the water be? The molar mass of the solute is 180.18 g/mol and the density of water is 1.0 g/m
a) 0.004072^{\circ}C
b) 100.4^{\circ}C
c) 73.37^{\circ}C
d) 0.4072^{\circ}C

100.4 degree celsius is the temperature of the water having non-electrolyte.

The correct answer is b.

Explanation:

Data given:

mass of non-electrolyte solute = 31.65 grams

volume of water = 220 ml or 0.22 litres

molar mass of solute = 180.18 grams/mole

density of water = 1 gm/mole

Boiling point of water = 100 degrees celsius

molality = ?

Kb for water = 0.51

boiling point elevation or temperature of hot water,T =?

Formula used:

T = mKb   equation 1

number of moles of non electrolyte =

number of moles = 0.17 moles

molality =

molality = 0.77 M

putting the values in equation 1

T = 0.77 X 0.51

T  = 0.392 degree celsius. is the elevation in temperature when solute is added.

Temperature of the hot water = 100 +0.392

                                                    = 100.392 degree celsius.

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.