Volume increases, pressure stays the same, temperature

Identify the number of neutrons in an atom having a mass number of 18 and an atomic number of 22.

Three of the strongest lines in the He + ion spectrum are observed at the following wavelength: (1) 11.397 nm (2) 54.030 nm (3) 72.

For which of the following reactions is the ratio kp/kc largest at 300 k?

A sample of concrete contains cement, gravel, crushed rocks, sand, and water. Each of these contains different metals and minerals and hence has different colors and different properties.

What does it mean when a reaction reaches its equilibrium

Which gas sample at STP has the same total number of molecules as 2.0 liters of CO2 (g) at STP

Benzene contains only carbon and hydrogen and has a molar mass of 78.1 g/mol. Analysis shows the compound to be 7.44% hydrogen by mass. Find the empirical and molecular Formula of benzene.

What is the Lewis structures for Ca (OH) 2

Compare and contrast homogeneous and heterogeneous mixtures using key terminology, and provide at least three examples of each. For example, explain what the mixture is comprised of and what makes it homogeneous or heterogeneous.

Which element would most likely have chemical properties similar to that of fluorine (F) ?