Which of these substances are molecules?

1. H2O

2. NaCl

3. N2

4. O2

Question 12 options:

3 and 4

All of them

1 and 2

None of them

For most atoms, how many electrons fill the outer shell? A. 4 B. 5 C. 2 D. 8

What is the correct name for P4S3?

Is thermal energy transferred from the dry ice to the water or from the water to the dry ice?

What is the definition of quanititative observation

Gravitational force acts on two objects with which of the following? A. mass B. force C. orbit D. speed I will thums up!

There is inverse relation between pressure and diffusion in liquid phase? •True •False

What do you need in order to do a stoichiometric calculation? (Choose multiple) Balanced Chemical Equation Molar masses of compounds involved The type of reaction taking place Oxidation Numbers

The correct mathematical expression for finding the molar solubility (s) of sn (oh) 2 is:

18. which bond is most polar? H--F H--Cl H--Br H--I

What kind of reaction is ca (s) + h3po4 (aq) ca3 (po4) 2 (s) + h2 (g)