A substance with a pH of 4.0 will

a. change red litmus paper to blue.

b. change blue litmus paper to red.

c. not change red or blue litmus paper.

d. not be testable using litmus paper.

The number of valence electrons in an atom can often be quickly determined by referencing A. the atomic mass of the element. B. the period number on the periodic table. C. the atomic number of the element. D. the group number on the periodic table.

Which of the following are likely to be affected by a magnet

A solution contains 5.25 g of urea, CO (NH2) 2 (a nonvolatile solute) and 0.100 kg of water. If the vapor pressure of pure water at 25∘C is 23.7 torr, what is the vapor pressure of the solution?

Vapor pressure is___related to the temperature of the liquid. - directly - not - inversely

The hydrolysis of sucrose (C12H22O11) into glucose and fructose in acidic water has a rate constant of 1.8*10-4s-1 at 25 ∘C. Assuming the reaction is first order in sucrose, determine the mass of sucrose that is hydrolyzed when 2.55 L of a 0.

Why is flammability is a chemical property and not a physical property.

Select the appropriate coefficient for O2 when the equation? O2 (g) + ? C5H12 (g) →? CO2 (g) + ? H2O (g) is balanced using the smallest possible integers.

If the number of neutrons in an atom is changed, does the atom become a new element? Why or why not? a. Yes. The number of neutrons determines the identity of an atom b. Yes.

What must be true for diffusion of a solute to occur across a partition that separates two compartments?

Salt dissolving in water is what type of property?