How many atoms of He are in 5.69 grams?

O

3.70 x 10 23

O

3.7x10 23

O

8.57 x 10 23

O

8,6 X 10 23

Name three chemical properties of wood

1. Summarize the rules for naming binary molecular compounds. 2. Define a binary molecular compound. 3. Describe the difference between a binary acid and an oxyacid. 4.

What nuclear symbol has 13 protons and 15 neutrons

What is the correct formula for the ionic compound formed from Mg+2 and O-2

Which element is likely to be the most reactive? bromine (br) chlorine (cl) fluorine (fl) iodine (i)

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?