A solution is prepared by dissolving 74.2 g NaI in 527 g of water. Determine the mole fraction of NaI if the final volume of the solution is 565 mL. a. 8.84 times 10^-2
b. 1.40 times 10^-3
c. 6.04 times 10^-3
d. 1.32 times 10^-2
e. 1.65 times 10^-2

The correct answer is option e, that is, 1.65 * 10^-2.

Explanation:

Based on the given information, the weight of NaI given is 74.2 grams and the weight of water given is 527 grams.

The final volume of the solution given is 566 ml.

The formula to calculate the moles is weight/molecular mass,

The moles of NaI will be,

= 74.2/150 = 0.494

Now moles of water will be,

= 527/18 = 29.3

The mole fraction of NaI will be,

= 0.494 / (0.494 + 29.3)

= 0.0165 or 1.65 * 10^-2

Hence, the mole fraction of NaI is 1.65 * 10^-2

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

2b2t

explanation:

2b2t