1.What mass of aluminum is needed to react with 10.0 kg of chromium (III) oxide to produce chromium metal ? The chemical equation for the reaction is Al(l) + Cr2O3(s) →Al2O3(s) + Cr(l)

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves

You open a can of soda at room temperature and hear a hiss. which of the following factors has changed inside the container? a.) atmospheric pressure b.) temperature of gas c.) type of gas d.) amount of gas

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm