객관식A sample in your lab has a mass of 2.7 kg and occupies a volume of 0.001 m^3. Based on its density, which substance is it most likely to be?103views
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)154views
객관식Which of the following best describes the relationship between specific gravity and refractive index for a series of liquids?101views
객관식Given two containers, a beaker and a test tube, each containing the same volume of water and an equal mass of iodine dissolved, which container has the higher density of iodine solution?102views
객관식At what temperature (in K) does uranium hexafluoride (UF_6) have a density of 0.5820 g/L at a pressure of 0.5073 atm?99views
객관식What is the density (in g/L) of xenon (Xe) gas at a pressure of 788 mmHg and a temperature of 25°C? (Molar mass of Xe = 131.3 g/mol; R = 0.0821 L·atm/(mol·K))113views
객관식A gas with a molar mass of 26.54 g/mol is at a pressure of 172 torr and a temperature of 27 °C. What is its density in g/L?104views
객관식What is the density of CO_2 gas (in g/L) at STP conditions if 2.50 g occupies 5.60 L at 789 torr?100views