A 39.6 mL aliquot of a 44.0 wt% aqueous KOH solution is diluted to 1.30 L to produce a 0.344 M KOH solution. Calculate the density of the 44.0 wt% KOH solution.

How do the energy differences between the higher energy levels of an atom compare with the energy difference between the lower energy level of the atom

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture