5. Which of the following is a chemical reaction?

A Iron rusts

B. Water freezes

C. Sugar dissolves in water.

D. Salt and pepper are mixed in a dish.

6. Abby is trying to Identify different liquids based on their physical properties. She has 4

Phenol and benzoic acid are both weak acids that are solublein ether and insoluble in water. Benzoic acid is soluble inboth 10% NaOH and 10% NaHCO3. Phenol is soluble only in thestronger base, 10% NaOH.

40 mL of 2.0 molar NaOH reacts with 8.0 mL of a monoproticacid. What is the molarity of the acid?

If the spheres represent a potassium atom and a potassium ion, which best represents the ion?

Why do ice cubes formed from water of a glacier freeze at a higher temperature than ice cubes formed from water of an underground aquifer?

Which of the following is not a reason that power plants are unable to achieve 100 percent efficiency? A. Entropy increases. B. The amount of work obtained from a process never has work needing to go into it. C. Heat is often a waste product. D.

Consider a liquid in a piston apparatus that is at equilibrium with the vapor phase. in which direction should the piston be moved to decrease the number of molecules in the liquid phase?

Based on its location in the periodic table, what can most likely be predicted about phosphorus? It has three valence electrons available for bonding. It has three nonbonding electrons. It has five valence electrons available for bonding.

The rate constant is found to be 3.9 x 10-5 M-1 s-1. Calculate the rate of formation of ozone when the concentration of oxygen atoms is 3.0 x 10-14 molar and the concentration of diatomic oxygen is 1.3 x 10-14 molar.

The element Oxygen, O, is an example of which of the following? Question 8 options: A compound B molecule C atom D mixture

The measurement 0.41006 gram, rounded to three significant figures, is expressed as