What mass of water will be produced from 2.70 moles of Ca(OH)2 reacting with HCl?

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

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

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line