How many oxygen molecules are in a flask that contains 1.43 grams of oxygen?

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

How many grams of aluminum will there be in 98g of al2o3?