객관식An oak board has a mass of 2.40 kg and a volume of 3.00 × 10^3 cm^3. What is the density of the oak board?101views
객관식When a substance has a density less than that of water, what will happen when it is placed in water?123views
객관식Which gas is more dense at standard temperature and pressure (STP), sulfur hexafluoride (SF_6) or helium (He), and what evidence supports your answer?143views
객관식The density of solid chromium (Cr) is 7.15 g/cm^3. How many atoms are present per cubic centimeter (cm^3) of Cr? (Atomic mass of Cr = 52.00 g/mol; Avogadro's number = 6.022 × 10^{23} atoms/mol)152views
객관식If a small object, such as a metal ball, has a high density, which of the following must be true about its mass?115views