Why do different elements have different colored flames when they are heated?

Which of the following has 20 neutrons? A. oxygen B. zirconium C. potassium D. neon

What does a circle filled in with a dark color represent in a pedigree chart?

It takes 242./kJmol to break a chlorine-chlorine single bond. Calculate the maximum wavelength of light for which a chlorine-chlorine single bond could be broken by absorbing a single photon. Round your answer to 3 significant digits.

Which statement about phospholipids is true? Heads of phospholipids are hydrophobic. Phospholipids allow any particle to freely pass through the phospholipid bilayer. Tails of phospholipids are hydrophobic.

The continental crust is?

What kind of reaction occurs when you mix aqueous solutions of barium sulfide and sulfuric acid?

What is true about empathy? Most anyone can learn this skill. Not everyone can learn this skill. It is a desirable attribute. choices A and C

What effect can new observations have on a scientific theory

The total number of valence electrons in the phosphate ion is

The reaction below has an equilibrium constant kp=2.2*106 at 298 k. 2cof2 (g) ⇌co2 (g) + cf4 (g) calculate kp for the reaction below. cof2 (g) ⇌12co2 (g) + 12cf4 (g)