How many carbon atoms are in a 1 carat pure diamond that has a mass of 0.20 g?
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How many carbon atoms are in a 1 carat pure diamond that has a mass of 0.20 g?
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- Mercury is the only metal that exists as a liquid (d=13.56 g/cm3) at room temperature. Find the number of moles in 15 mL of mercury.A container of gas holds 1.04 moles of neon gas. If the volume of the container is 10.1 liters and the pressure inside is 2.4 atm, what is the temperature (in K) of the gas?Muffins are taken out of the oven with a temperature of 200°F and are placed on a cooling rack with a room temperature of 70°F. After 15 minutes, the muffins have cooled to 170°F. If it is recommended to wait 30 minutes before eating, what temperature would the muffins be? Round the value of k to the nearest fourth decimal place.
- Problem 1: Answer the following questions using the table to the right. Medium Gases at 0 °C, 1 atm Air Carbon dioxide Hydrogen Oxygen 1.000293 1.00045 1.000139 1.000271 Liquids at 20 °C Benzene Carbon disulfide Carbon tetrachloride Ethanol Glycerine Water, fresh 1.501 1.628 1.461 1.361 1.473 1.333 Solids at 20 °C Diamond Fluorite Glass, crown 2.419 1.434 1.52 Glass, flint |Ice (at 0 °C) Polystyrene Plexiglas Quartz, crystalline Quartz, fused Sodium chloride 1.66 1.309 1.49 1.51 1.544 1.458 1.544 Zircon 1.923 Part (a) Calculate the index of refraction for a medium in which the speed of light is 2.012 × 10°. Numeric : Anumeric value is expected and not an expression. Part (b) Determine the most likely identity of the substance based on the table in the problem statement. MultipleChoice : 1) Carbon tetrachloride 2) Diamond 3) Ethanol Sodium chloride 5) Plexiglass 6) Water, fresh 7) Glycerine 8) Polystyrene 9) Glass, crown 10) Glass, flintJanice is grilling a steak for her July 4th barbecue dinner. The steak initially weighs 300 grams and is 25 mm thick. After grilling it for a while, she considers the steak done, and measures it again: it now weighs 215 grams, and is 15 mm thick. For both the cooked and uncooked steak, she uses the thumb-test to determine the done-ness, i.e. she uses her thumb (area ~5cm2) to push down with a force of 5 N. The uncooked steak compresses by 7 mm, and the cooked steak by 2 mm. The change in elasticity of the steak on cooking is due partly to the loss of water volume (so that existing bonds get closer together) and partly to the creation of new bonds. Assume all of the difference in raw vs. cooked steak thickness is due to water loss that makes it thinner (25 mm thick in the uncooked steak, versus 15 mm thick in the cooked steak), and that the other dimensions of the steak (length and width) have not changed. By what percentage has the steak's volume decreased from the original value?…Problem 16: The density of a particular alloy is 3.4 g/cm3. What is this density in kg/m3? ρ = ______kg/m3
- One component of a metal sculpture consists of a solid cube with an edge of length 36.9 cm. The alloy used to make the cube has a density of 6610 kg/m³. Find the cube's mass. m = kgAn object has mass m, surface area A, temperature T, N molecules, and specific heat capacity c. The total thermal energy stored in the object is: Group of answer choices proportional to T^4 proportional to AT proportional to m proportional to cT proportional to NTA container of gas holds 0.74 moles of neon gas. If the volume of the container is 11.8 liters and the pressure inside is 1.97 atm, what is the temperature (in K) of the gas?
- A 5.50 L sample of neon at 6.67 atm is added to a 10.0 L cylinder that contains argon. If the pressure in the cylinder is 7.63 atm after the neon is added, what was the original pressure (in atm) of argon in the cylinder? Hint is given in the feedback. Answer: 6.3315 Hint, what pressure would the neon have in the second container if no argon were present?An apartment has the dimensions 16 m by 8 m by 5 m. The temperature is 30°C, and the relative humidity is 51 percent. What is the total mass (in kg) of water vapor in the air in the apartment?A physical chemist measures the temperature inside a vacuum chamber. Here is the result. T=-75.3 degrees celsius Convert to SI units. Round your answer to decimal place.