For an atoms electrons, how many energy sublevels are present in the principal energy level n = 4? A. 4
B. 9
C. 10
D. 16
E. 32

by the own's formula energy sublevels are 2 the power of n or principal quantum number this means 2 the power of 4 equal to 32

8.324 g

Explanation:

First we convert 750.0 mL into L:

Then we calculate the required number of moles of CaCl₂, using the definition of molarity:

Finally we convert 0.075 moles of CaCl₂ into grams, using its molar mass: