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Skip designs tracks for amusement park rides. For a new design, the track will be elliptical. If the ellipse is placed on a large coordinate grid with its center at (0, 0), the equation 9x 2 + 25y 2 =225 models the path of the track. The units are given in yards. How long is the major axis of the track? Explain how you found the distance
Calculate the heat capacity of a calorimeter if the combustion of 5.000 g of benzoic acid led to a temperature increase of 24.153 degrees Celsius. The heat of combustion of benzoic acid is 26.38 kJ/g.
When 45.0 g of an unknown nonvolatile nonelectrolyte is dissolved in 500.0 g of water, the resulting solution freezes at -0.930 °C. What is the molar mass of the unknown substance? Kf = 1.86 °C/m for water.
A 2.30-g sample of a large biomolecule was dissolved in 22.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
Hydrogen bonding between polyamide chains plays an important role in determining the properties of a nylon such as nylon 6,6 (Table 12.2) Draw the structural formulas for two adjacent chains of nylon 6,6 and show where hydrogen-bonding interaction..
You have a solution of NaCl dissolved in water. Describle a method by which these two compounds could be separated.
What kinds of supplies/animals do you bring, and how long do you anticipate your voyage taking. Be specific and use specific examples of the kinds of winds, currents, gyres, and temperatures (and whatever else you will need to provide to justify y..
When the reaction A + B = C is at equilibrium, the concentrations of different chemicals is as follows: [A] = 2.00 mM, [B] = 3.00 mM, and [C] = 9.00 mM. What is the standard free energy change for the reaction
Suppose that a compound "x" can be made from the reaction of two other compounds, "a" and "z". A. write a balanced equilibrium expression for this reaction
a 10.0l container of helium gas with a presure of 250mmhg at 0 degrees celsius is heated to give a pressure of
If a 10.0 g sample of platinum metal has a volume of 4.67 mL, what is the density of platinum in g/cm3
Problem- What are two elements next to each other that have decreasing atomic masses on the periodic table
A 9.70-g piece of solid CO2 (dry ice) is allowed to sublime in a balloon. The final volume of the balloon is 1.00 L at 298 K. What is the pressure of the gas?
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