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A: Ans:- Image-1
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- Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber a) If the sample of gold,with a mss of 27.63g, is pressed into a leaf of 2 um thickness, what is the area of the leaf? b)If instead,the gold is drawn out into a cylindrical fiber of radius 3 um , what is the lenght of the fiber ?The density of air under ordinary conditions at 25 °C is 1.19 g/L. How many kilograms of air are in a room that measures 13.0 ft x 12.0 ft and has a 9.0 ft celing?The vapor pressure of mercury at 25°C is 0.00243 atm. Calculate the vapor pressure in kPa. Round answer to 3 significant digits.
- Find the number of molecule per unit volume of oxygen at N.T.P. (Mass of oxygen 5.313 × 1026 kg. R.M.S. speed of molecule = %3D oxygen molecules at N.T.P. = 461.2 m/s and 1 atmosphere pressure = 1.013 × 10° N/m²).The vapor pressure of water at 25°C is 0.0313 atm. Calculate the vapor pressure in kPa.Round answer to 3 significant digits.Gold has a density of 19.32 g/cm3.What is the length of a side of a gold cube of mass 27.63 g?
- The unit cell of platinum has a length of 392.0 pm along each side. Use this length (and the fact that Pt has a face-centered unit cell) to calculate the density of platinum metal in kg/m3 (Hint: you will need the atomic mass of platinum and Avogadro's number).The specific weight of water at ordinary pressure and temperature is 9.81 kN/m3. The specific gravity of mercury is 13.56. Compute the density of water and the specific weight and density of mercury.-A piece of stone weighs 0.05 pounds. When it is submerged in a graduated cylinder containing 50 ml of water, the level rises to 60 ml. What is the density of stone in g/ml. Ans 2.27 g/ml -The temperature at which mercury freezes is -35°C. What temperature in degrees Fahrenheit at which a mercury thermometer cannot be used? Ans. -31 °F
- A ballon has a volume of 2500.0 mL on a day when the temperature is 30.0 degrees. If the temperature at night falls to 15.0 degrees, what will be the volume of the balloon if the pressure remains constant.If a gas at 25 °C occupies 3.7 L at a pressure of 0.97 atm, what would be the volume if the pressure is increased to 2.06 atm?If the specific weight of a gas is 12.40 N/m^3, what is its specific volume in m^3/kg?