What is the empirical formula for a sample containing 81.70% carbon and 18.29% hydrogen? a. chb. ch3c. c2h6d. ch4e. c3h8?

In the following neutralization reaction, which substance is the salt? HCl + NaOH → NaCl + H2O

Electrons are added in the outermost in groups 13 through 18

Acetone is a solvent in some nail polish removers. which explains why acetone dissolves nail polish?

Question 4 (higher question) Electrolysis of acidified water can produce hydrogen and oxygen. The apparatus for the electrolysis is: .

What happens when the solid sulfur is melted

Andy has two samples of liquids. Sample A has pH of 4, and sample B has a pH of 6. what can Andy conclude about these two samples? Sample A is a neutral b alkali c acidic Sample B is a neutral b alkali c acidic

How does a lone pair contribute to molecular shape? A. It is too small to affect the molecule's shape. B. It takes up space like an "invisible" atom. C. It forces the molecule into a tetrahedral shape. D. It lets the bonding pairs spread out more.

The are of a rectangle is 12 in^2. what is the area in cm^2. there are 2.54cm in an inch.

Which statements describe advantages of models? Check all that apply. Models make it possible to easily notice patterns. Models can be used to communicate and test design ideas. Models allow scientists to predict relationships.

Are energy levels and orbitals the same thing?