Each night you measure your height just before going to bed. When you arise each morning, you measure your height again and consistently find that you are
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Chapter 11 Solutions
Modified Mastering Physics with Pearson eText -- Standalone Access Card -- for Conceptual Integrated Science
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- In 12.0 g of carbon, there are NA = 6.02 x 10^23 carbon atoms (Avogadro’s number). If you could count 1 atom per second, how long would it take to count the atoms in 1.00 g of carbon? Express your answer in years.arrow_forwardManufacturers of headache remedies routinely claim that their own brands are more potent pain relievers than the competing brands. Their way of making the comparison is to compare the number of molecules in the standard dosage. Tylenol uses 325 mg of acetaminophen (C8H9NO2) as the standard dose, whereas Advil uses 2.00 × 102 mg of ibuprofen (C13H18O2). Find the number of molecules of pain reliever in the standard doses of (a) Tylenol and (b) Advil.arrow_forwardThe active ingredient in the allergy medication Claritin contains carbon (C), hydrogen (H), chlorine (Cl), nitrogen (N), and oxygen (O). Its molecular formula is C22H23Cl N2O2. The standard adult dosage utilizes 1.424 x 1019 molecules of this species. Determine the mass (in grams) of the active ingredient in the standard dosage.arrow_forward
- The average distance that a molecule travels before colliding with another molecule is called the mean free path and is given by: where d is the diameter of the molecule and N, is the number of molecules per unit volume. The number of collisions that a molecule makes with other molecules per unit time, or collision frequency f, is given by f = avg (a) Determine the mean free path (in m) of hydrogen molecules in a tank that has a volume of 12.5 L, a gauge pressure of 110 atm, and a temperature of 20.0°C. The average diameter of hydrogen molecules is 0.740 x 10¬10 m. 1.49E-8 m (b) Determine the average time interval (in s) between molecular collisions for a molecule of hydrogen gas. 0.52 How is the time of interest related to the collision frequency? Check the text for an expression for the average speed. Remember to express the molecular mass in terms of kilograms and that the temperature must be in kelvins. sarrow_forwardManufacturers of headache remedies routinely claim that their own brands are more potent pain relievers than the competing brands. Their way of making the comparison is to compare the number of molecules in the standard dosage. Tylenol uses 325 mg of acetaminophen (C8H9NO2) as the standard dose, while Advil uses 2.00 x 102 mg of ibuprofen (C13H1802). Find the number of molecules of pain reliever in the standard doses of (a) Tylenol and (b) Advil. (a) Number Units (b) Number Unitsarrow_forwardIn the lungs, a thin respiratory membrane separates tiny sacs of air from the blood in the capillaries at atmospheric pressure. These sacs are called alveoli (spherical shape), and it is from them that oxygen enters the blood. The diameter of the alveoli is 0.25 mm, and the air inside contains 14% oxygen. If the air behaves as an ideal gas at body temperature of 37 °C, find the number of oxygen molecules in one of the sacs?arrow_forward
- Buckminsterfullerene is the famous "buckyball" molecule with the molecular formula C60. It has a cage-like structure that resembles a soccer ball, made of twenty hexagons and twelve pentagons. How many moles of C60 are there in 1.0 kg of Buckminsterfullerene? 0.023 mol 1.4 mol 8.4×1023 mol 4.3×10-20 mol 0.12 molarrow_forwardGold has a molar mass of 197 g/mol. (a) How many moles of gold are in a 1.09 g sample of pure gold? (b) How many atoms are in the sample? (a) Number Units (b) Number Unitsarrow_forwardyeasts are able to produce high internal concentrations of glycerol to counteract the osmotic pressure of the surrounding media. suppose that a sample of yeast cells were placed in a 4% sodium chloride solution by weight. The density of solution is at 25 C = 1.02 g/ml, Molecular weight of solute = 58.44 g/mol, i of glycerol = 1 R=0.08205 L-atm/mol-K What is the weight of solute (in grams)? What is the moles of solute? What is the volume of the solution (in liters)? What is the molarity of the solution? What is the value of the temperature to be used to solve for the osmotic pressure of the solution? What is the osmotic pressure of solution At the same temperature, what will be the molar concentration of glycerol considering the computed osmotic pressure of the solution and the normal osmotic pressure inside a yeast cell of 7.3 atmospheres?arrow_forward
- All but one of the following statements is true. Which one is not true? A mass (in grams) equal to the molecular mass (in atomic mass units) of a pure substance contains the same number of molecules, no matter what the substance is. Ten grams of a pure substance contains the same number of molecules, no matter what the substance is. One mole of any pure substance contains the same number of molecules. Ten grams of a pure substance contains twice as many molecules as five grams of that substance. Avogadro's number of molecules of a pure substance and one mole of the substance have the same mass.arrow_forwardHow many moles of water are there in 1.000 L at STP? Express your answer using four significant figures. n = mol Submit Request Answer Part B How many molecules? Express your answer using four significant figures. Hνα ΑΣφ ? N =arrow_forwardIf the osmotic pressure of the blood is within (100 psi) at a temperature of (37°C). How much glucose must be used per (L1) for intravenous purposes so that its osmotic pressure equals the osmotic pressure of the blood. Note that,R = 0.0821 L. atm. K-1. mol and the molecular weight of glucose g/mole 180arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
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