What has to happen before a star is able to do a chemical reaction?

What ion is formed when an atom of magnesium (mg) loses two electrons? mg-1 mg-2 mg 1 mg 2

Match each gas law with the correct statement. Boyle's Law Charles's Law Gay-Lussac's Law A. The pressure of a gas varies directly with temperature if the volume is kept constant. B.

1. How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O a. 5 x (6.02 x 10^23) b. 5 c. 35 d. 35 x (6.02 x 10^23) 2. How many molecules are in 2.10 mol CO2? a. 2.53 x 10^24 molecules b. 3.79 x 10^24 molecules c. 3.

a 280.0 mL sample of neon exerts a pressure of 660.0 toff at 26.0 celsius. at what temperture would it exert a pressure of 940.0 torr in a volume of 0.44 L

The top of the saturated zone is known as?

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.