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A: Ans:- Image-1
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- 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?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 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).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 vapor pressure of water at 25°C is 0.0313 atm. Calculate the vapor pressure in kPa.Round answer to 3 significant digits.
- 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.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 °FIf 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 T is 90N, what is the value of Tx of m2? n T 112 Ⓒ = 40.3° m₂g m₂ mag
