The electron pair geometry of a molecule is tetrahedral. What is its bond angle if it shows one lone pair of electrons and three bonding pairs?

A) Less than 109.5°

B) More than 109.5°

C) Equal to 109.5°

D) Zero

Which of the following ideas about the atom changed when new evidence was discovered? A. Elements are different kinds of atoms. B. All matter is made up of atoms. C. Atoms cannot be divided. D. Atoms are made up of smaller particles.

A gas is contained in a thick-walled balloon. When the pressure changes from 18.7 psi to 20.2 psi, the volume changes from 0.475 L to 1.054 L and the temperature changes from K to 465 K.

A zero-order reaction has a constant rate of 2.20*10-4 M/s. If after 45.0 seconds the concentration has dropped to 9.00*10-2 M, what was the initial concentration?

Which is the most electronegative element

In a polar covalent bond, A) electrons are shared equally between atoms. B) electrons are not shared equally between atoms. C) a cation is bonded to an anion.

Particles of matter how have both potential and kinetic energy is that true or false?

Visible light waves are part of the blank Spectrum

Why does a soccer ball stop rolling in a soccer game which newton law shows that?

What is the name of the compound PbS2 • 4H2O?

Why doesn't gravity pull water all the way to the center of the Earth?