The acidity or alkalinity of an unknown aqueous solution is indicated by its

(1) pH value

(2) electronegativity value

(3) percent by mass concentration

(4) percent by volume concentration

You place a balloon in a closed chamber at standard temperature and pressure (STP). You cool the chamber to half of its original temperature while leaving the pressure constant. What happens to the balloon? It stays the same volume.

Gases tend to deviate from the ideal gas law at a. high pressures b. low pressures c. high temperature d. low pressures and high temperatures

The temperature of the cooling water as it leaves the hot engine of a certain automobile is 244°F. After it passes through the radiator it has a temperature of 177°F.

When salt dissolved in water, what type of change occurs? A) physical only B) chemical only C) physical and chemical

What type of relationship does temperature and pressure have?

Catalysts are substances that increase the rate of reaction but can be recovered unchanged at the end of the reaction. Catalysts can be classified as either homogeneous (same state as reactants) or heterogeneous (different state than reactants).

How many molecules are there in 79g of Fe2O3?

Which of the following elements is an alkall metal?

A student mixes 0.50 L of 0.0020 M Ba (NO3) 2 solution with 0.50 L of 0.0080 M Na2SO4 solution. Which equation shows the proper set-up to calculate molar concentration of Ba2 + ions in the new solution? (0.0020 M) (1 L) = (? M) (0.0020 M) (0.

A silver block, initially at 58.5°C, is submerged into 100.0 of water at 24.8°C in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 26.2 °C. What is the mass of the silver block?