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- A sample of volume 270 cm³ has a mass of 0.645 kg. (a) What is the density of the sample? (b) Is the material gaseous or condensed? g/cm3Taking the density of air to be 1.29 kg/m3, what is the magnitude of the linear momentum of a cubic meter of air moving with the following wind speeds? (a) 48 km/h kg · m/s(b) 74 mi/h—the wind speed at which a tropical storm becomes a hurricane kg · m/sA graduated cylinder (measuring cylinder) contains 27 mL of water at 25 °C and the mass of the water is 26.92 g. A sphere of iron with a diameter of 18.0 mm is added to the water in the graduated cylinder. The total mass of the water and the iron is 50.92 g. (The volume of a sphere is given by the expression: V = (4/3)ar³). (i) Calculate the total volume of the water and the iron in the graduated cylinder. (ii) Determine the density of iron at 25 °C? Show your calculations. (iii) Without doing any calculations, what do you think the density of 48.00 g of iron is at the same temperature? Explain your answer.
- (4) The normal melting point of gold is 1064.5 °C and its boiling point is 2660 °C. (a) Convert these two values to the Fahrenheit and Kelvin scales. (b) Find the difference between those two values in Celsius. (c) Repeat (b) using the Kelvin scale. (6) The Eiffel tower is built from iron and it is about 324 m high. Its coefficient of linear expansion is approximately 12 x 10-6 (C°)¯l and assumed constant. What is the increase in the tower's length when the temperature changes from 0°C in winter to 30°C?Describe the PHYSICAL PROPERTIES of the following substances Specifically, what type of matter is this? (e.g. halogen) (a) Potassium dichromate | (b) Glucose (CH½O«) (c) MagnesiumA(s)+3B(l)−⇀↽−2C(aq)+D(aq)A(s)+3B(l)↽−−⇀2C(aq)+D(aq) in terms of [A],[A], [B],[B], [C],[C], and [D],[D], as needed. Note that Kc,Kc, which is sometimes symbolized as Keq,Keq, denotes that the equilibrium constant is expressed using molar concentrations. For this question, KcKc means the same thing as Keq.Keq. Kc=Kc=
- (a) If the density of a liquid is 0.80 g/mL, what is its specifi c gravity? (b) If the specifi c gravity of a substance is 2.3, what is its density?(a) Normally the human body can endure a temperatureof 105°F for only short periods of time without permanentdamage to the brain and other vital organs. What is thistemperature in degrees Celsius? (b) Ethylene glycol isa liquid organic compound that is used as an antifreezein car radiators. It freezes at −11.5°C. Calculate itsfreezing temperature in degrees Fahrenheit. (c) Thetemperature on the surface of the sun is about 6300°C.What is this temperature in degrees Fahrenheit?3. (a) Express (as/aT), in terms of measurable properties beginning with the definition of ds and recognizing that dS = dH = CpdT