If you start with 5 molecules of O2 in the reaction 2Mg+O2--> 2MgO, how much Mg will you need?

a.

4

c.

8

b.

5

d.

10

In a salt solution, what happens to sodium and chloride ions?

For the past 100 years global temperatures have

A skeleton chemical equation includes which of the following

State relationship between the level of dissolved oxygen and water temperature

Which change would result in a stronger electromagnet?

Air currents move objects in the air. Explain how a convection current might affect the flight of a hot air balloon

Compare atomic number, mass number, and atomic mass

How does mass affect thermal energy transfer?

Explain whether nitrogen atoms will form bonds with other atoms.

A large sample of solid calcium sulfate is crushed into smaller pieces for testing. which two physical properties are the same for both the large sample and one of the smaller pieces?