Three cubes of equal mass are composed of gold (density = 19.32 g/cm³), platinum (density = 21.45 g/cm³), and lead (density = 11.35 g/cm³). Choose the option that lists the cubes from smallest to largest.

You are hiking in the mountains and find a shiny gold nugget. It might be the element gold, or it might be iron pyrite, FeS₂, or "fool's gold". Which of the following physical properties do you think would help determine if the shiny nugget is real gold?

When identifying an unknown substance, a student gathers some observations like mass, volume, density, and color. Which of these observations is considered an intensive property of the substance?

Which separation method is better suited for separating a solution of sugar and water into pure substances?

Calculate the kinetic energy, in joules of a 1200-kg automobile moving at 18 m/s.

Two positively charged particles are first brought close together and then released. Once released, the repulsion between particles causes them to move away from each other. This is an example of potential energy being converted into what form of energy?

Take the measurement 15.7 x 10³ g out of scientific notation and into the expanded form, using the appropriate unit.

The density of titanium metal is 4.51 g/cm³ at 25^oC. What mass of titanium displaces 125.0 mL of water at this temperature?

A bumblebee flies with a ground speed of 15.2 m/s. Calculate its speed in km/hr.

Hydrogen sulfide is composed to two elements, hydrogen and sulfur. In an experiment, 6.500 g of hydrogen sulfide is fully decomposed into its elements. If 0.384 g of hydrogen is obtained in this experiment, how many grams of sulfur must be obtained?

In a series of experiments, a chemist prepared three different compounds that contain only nitrogen and oxygen and determined the mass of each element in each compound as follows

Compound 1 - N = 30.82 g, O = 17.60 g

Compound 2 - N = 30.82 g, O = 35.20 g

Compound 3 - N = 30.82 g, O = 70.40 g

Using the ratio of oxygen per gram of nitrogen, how do these data support Dalton's atomic theory?

The radius of an atom of gold is about 1.35 Å. How many gold atoms would have to be lined up to span 1.0 mm?

Consider an atom of Boron-10. How many protons, neutron, and electrons does this atom contain?

Three naturally occurring isotopes of magnesium are 24Mg (23.985 u) at 75.99%, 25Mg (24.986 u) at 14.00%, 26Mg (25.983 u) at 10.01%. What is the average atomic mass of Mg? Do not use your periodic table!!

Which of the following is not a correct pairing for a name of an element?

Some molecules, such as hydrogen, oxygen, and nitrogen, exist naturally as two bonded elements. What are these types of molecules called?

A single molecule of glucose has a molecular formula of C₆H₁₂O₆. What is the empirical formula of glucose?

Identify the ion that has the following characteristics:

22 p⁺

26 n^o

19 e^-

Which of these compounds would you expect to be ionic? (answer all that apply)

Write the empirical formula of the compound formed by Al³⁺ and Cl^-.