2. You have 2 m3 of a mineral ore sample. It has a mass of 1 * 104 kg. Calculate the density of the ore sample and express your results in g/cm3 with appropriate scientific notation.

A reaction at 17.0 degree C evolves 788. mmol of dinitrogen difluoride gas. Calculate the volume of dinitrogen difluoride gas that is collected. You can assume the pressure in the room is exactly 1atm.

Is hydrogen malleable, ductile or brittle

Most scientists recommend reducing carbon dioxide emissions

The atomic mass of iron is 55.85, and oxygen is 16.0. What is the mass of 6.02 * 1023 molecules of Fe2O3?

If 7.84 * 107 J of energy is released from a fusion reaction, what amount of mass in kilograms would be lost? Recall that c = 3 * 108 m/s.

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) ?