If a substance changes color, what has most likely happened? A pressurized change has taken place.

A.) A chemical change has taken place.

B.) A physical change has taken place.

C.) Nothing has taken place.

At what phase do the chromosomes line up in the center of the cell?

What is the molality of a solution that has 3 mol of glucose in 6 kg of water?

An ion has a net charge of 3+. If this ion has 8 protons, how many electrons does it have? A. 3 B. 5 C. 7 D. 8 E. 11

Based on the equations below, which metal is the most active? pb (no3) 2 (aq) + ni (s) â ni (no3) 2 (aq) + pb (s) pb (no3) 2 (aq) + ag (s) â no reaction cu (no3) 2 (aq) + ni (s) â ni (no3) 2 (aq) + cu (s)

Where are the protons, neutrons, and electrons located in an atom? 1) protons, neutrons, and electrons are found in the nucleus 2) neutrons and electrons are in the nucleus while the protons surround the nucleus 3) protons and neutrons are in the

List all of the species that would have a net attraction to the positive charge: CH4, CH2Cl2, H3O+, H2O, C2H2Cl2, CO2, N3-,

if the units cancel and you are left with only the desired units for the problem, all the rations were set up correctly. True or false?

How many valence electrons are in c4h6br2?

Calculate the empirical formula from the given percent compositions. 82% nitrogen (N), 18% hydrogen (H)

Atoms of different isotopes of the same element differ in their total number of electrons neutrons protons valence electrons