Pentane gas is used to blow bubbles in molten polystyrene to make Styrofoam—fun! The normal boiling point of pentane is 36 °C. What is its vapor pressure at 25 °C? Please help me in steps, I want to learn how to do this
A thin film of polystyrene is used as an antireflective coating for fabulite (known as the substrate). The index of refraction of the polystyrene is 1.49, and the index of refraction of the fabulite is 2.409. (Figure 1) Part A What is the minimum thickness of film required? Assume that the wavelength of the light in air is 470 nanometers. Express your answer in nanometers.
thermometer A 52.7 g sample of polystyrene is put into a calorimeter (see sketch at right) that contains 150.0 g of water. The polystyrene sample starts off at 94.8 °C and the temperature of the water starts off at 25.0 °C. When the temperature of the water stops changing it's 32.5 °C. The pressure remains constant at 1 atm. insulated container water Calculate the specific heat capacity of polystyrene according to this experiment. Be sure your answer is rounded to...
Packing material made of pieces of foamed polystyrene can easily become charged and stick to each other. Given that the density of this material is about 35kg/m3, estimate how much charge might be on a 2.0 cm -diameter foamed polystyrene sphere, assuming the electric force between two spheres stuck together is equal to the weight of one sphere.
1. A sample of polystyrene has a number average molecular weight of 30,000 daltons. What is the number average degree of polymerization (n)? The mer structure is shown below, amu are C-12, H-1; 1 dalton 6.023x103 grams
Packing material made of pieces of foamed polystyrene can easily become charged and stick to each other. Given that the density of this material is about 35 kg/m^3, estimate how much charge might be on a 2.0 cm-diameter foamed polystyrene sphere, assuming the electric force between two spheres stuck together is equal to the weight of one sphere. Express your answer using two significant figures.
Problems 30 Air n=1 . 1. Light is incident on a right triangular polystyrene (n = 1.59) prism at an angle of 6 as shown on the right. A. If , is 5º what is 0.? B. What is the minimum value for 0; in order to get total internal reflection at the right face (hypotenuse) of the the prism? 0, n=1.59 60
A sample of polystyrene, which has a specific heat capacity of 1.880 J.g .°C , is put into a calorimeter (see sketch at right) that contains 300.0 g of water. The polystyrene sample starts off at 94.9 °C and the temperature of the water starts off at 22.0 When the temperature of the water stops changing it's 27.7 °C. The pressure remains constant at 1 atm. Calculate the mass of the polystyrene sample. Be sure your answer is rounded to...
Question 1: Your bear cooler is made of 20-mm-thick polystyrene (k = 0.021 W/m.K) and has interior dimensions of 0.5 mx0.3 m X 0.3 m. If you fill the inside with an ice-water mixture (so the temperature is maintained at 4°C) and leave the cooler on the porch on hot summer day (ambient temperature of 30°C ), what is the heat flux through the container wall? Assume negligible heat gain through the base of the cooler. You may have to...
What are the advantages and limitations of: 1. Merrifield resin (simple cross linked polystyrene-based resin) 2. PAM resin (4-hydroxymethyl-phenylacetamidomethyl resin) 3. BHA resin (benzhydrylamine resin)