Suppose you take a deep breath, and your lungs fill with a volume of air equal to 2.25 L. 1. What is the mass of the breath, in grams, if the density of air is 1.29 × 10-3 g/cm3? m=
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Suppose you take a deep breath, and your lungs fill with a volume of air equal to 2.25 L.
1. What is the mass of the breath, in grams, if the density of air is 1.29 × 10-3 g/cm3? m=
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- How many cubic centimeters (cm3) are in one cubic meter (m3)?The average life expectancy in Japan is 81 years. What is this time in SI units?The Colburn equation for heat transfer is: where Cp is heat capacity, Btu Ib °F; µ is viscosity, Ib h* ft; k is thermal conductivity, Btu h ft? (°F ft); D is pipe diameter, ft; andG is mass velocity per unit area, Ib h ft?. h 2/3 0.023 k DG 0.2 The Colburn equation is dimensionally consistent. What are the units and dimensions of the heat transfer coefficient, h? Please write here the complete process that you used to determine the correct units and dimensions of h. Please note that the problem is asking for two separate items, units and dimensions are not the same. In this problem, your results will be given in the
- The density of bubble gum is about 1g/cm3. You blow an 8g wad of gum into a bubble 9cm in diameter. What is the thickness of the bubble? Use the equation: 4πr2 to help solve the problem.One mole of Gold (Au) atom has a mass of 197 g. We know that the density of gold is 19.30 g/cm3 in room temperature. Using those numbers, answer the following questions: a) What is the mass of a single gold atom in kg? b) Assume that gold atoms sit in a perfect cubic crystal structure. Estimate the distance between two gold atoms in meters. c) If we have a gold cube of 6 cm on each side, how many atoms can we fit along the edge of each side of the cube? d) What would be the mass, in kilograms, of the gold cube we discussed in part (c) (measuring 6 cm on each side)?Paperweight I bought a pack of 100 rectangular index cards. Each card measured 15 by 10 cm. The pack said ：Paper Density = 200 GSM (grams per square meter). This means that a square meter of those cards weighs 200 g. A) All of the cards in the pack are place flat on a table without overlap. In square meters, what is the total area of the table covered by the cards? B) Each pack of cards is wrapped in a sheet of 50 GSM paper with an area of 800cm squared. I have a number of packs and wish to store them on a shelf that cannot hold more than 10 kg. What is the largest whole number of wrapped packs that can be stored? C) The total weight of 500 identical sheets of paper is 2.4kg. If each sheet measures 30cm by 20cm, what is its paper density in GSM? D) A business card measures 55mm by 90mm. Its paper density is 300 GSM. Fins its exact weight in grams.
- The density of platinum is 21.45 x 103 kg/m3. a. Calculate the volume (in m3/atom) occupied per platinum atom b. Estimate the atomic diameter (in m);(The estimate uses the approximation that it is a cubic volume) c. Using this estimation, calculate the thickness of a metal foil (in m) containing 2.0 x 101 atomic layers of platinum.a. A painter uses 4.5 litres of paint to cover a wall with an area of 50 m2. Calculate the average rate of paint coverage in m2/L. b The painter works for 1.5 hours and then rests for half an hour before completing the painting in another hour. Find the average rate at which the painter paints the wall in m2/h.Q 2: a- If you had 0.2 kg of helium, how many helium atoms would you have? b- If you had 10 dozen helium atoms, what would be their mass? c- What is the mass of one helium atom? d- What is the mass of 2.0 moles of helium atoms?
- The density of water Is known to be 0.9998395 g/cm. During experimentation, you determine the density of water to be 1.0220 g/cm³. ASK YOUR TEACHER Using the correct % error/difference/change formula, (you are not being told which % formula to use - you must decide which one is correct for this situation) calculate the answer to the correct number of significant figures. The formulas are: percent change, percent difference, percent error. O 22.164057% O 22.1641% O 0.222% O 22.164057% O 22.2% O 22.165% MacBook Air 226 esc FI 23 24 Q W IT Y G K く V command option option command つ つ エ のThe density (p) of the atmosphere as a function of altitude (A) can be approximated by the model shown in the graph. What are the units of the constant 1.225? O A. dimensionless O B. kg m^3 OC. kg/m^3 O D. m^2/kg p= 1.225 e0.0001 A O E. m OF. kg O G. m^3/kg O H. kg/m^2 Altitude (A) (m] Density (p) [kg/m®]A rectangular container measuring 24 cm ⨯ 48 cm ⨯ 68 cm is filled with water. What is the mass of this volume of water in kilograms and grams?
