Question

how many moles are contained in each of the following? be sure each of your answer entries has the correct number of significant figures. part 1 of 2 90.0 g of potassium iodide (ki) 90.0 g ki = \square mol ki

Explanation:

Step1: Find molar mass of KI

Molar mass of K (potassium) is 39.10 g/mol, molar mass of I (iodine) is 126.90 g/mol. So molar mass of KI is $39.10 + 126.90 = 166.00$ g/mol.

Step2: Calculate moles using formula $n=\frac{m}{M}$

Given mass $m = 90.0$ g, molar mass $M = 166.00$ g/mol. So moles $n=\frac{90.0}{166.00}\approx0.542$ mol.

Answer:

0.542