Question

whether or not two substances are miscible can be generally be predicted by the rule of thumb that states_______.
it takes one to know one
a penny earned is a penny saved
opposites attract
like dissolves like

question 10
1 pts
calculate the mass of 1.000 mole of cacl₂.
115.61 g
110.98 g
151.06 g
75.53 g

Explanation:

Question 1

In chemistry, the rule for predicting miscibility of substances is "like dissolves like", meaning substances with similar polarities will mix well.

Step1: Determine atomic masses

The atomic mass of Ca is approximately 40.08 g/mol and Cl is approximately 35.45 g/mol.

Step2: Calculate molar - mass of CaCl₂

CaCl₂ has 1 Ca and 2 Cl atoms. The molar mass $M$ of CaCl₂ is $M = 40.08+2\times35.45$.
$M=40.08 + 70.90=110.98$ g/mol.

Answer:

D. like dissolves like

Question 2