Confidence interval for the proportion
In a survey of 1430 undergraduate students, 1087 reported that they had one or more credit cards. Provide a 95% confidence interval for the proportion of all college students who have at least one credit card.
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Determine the numbers of oxide ions surround each Mg2 + ion as nearest neighbors? MgO has the same cyrstal structure as NaCl, face-centered cubic.
To effuse from a hole in a chamber a given volume of nitrogen needed the 68.3 seconds. Under the same conditions, another gas needed 85.6 seconds for the same volume to effuse. How can estimate the molecular mass of this gas?
Estimate the likely molecular formula for this compound? The boiling point of another member of this homologous series was found to be 309 k.
Estimate the temperature at which water boils on a day in the mountains when the barometric pressure is having 593mmHg where the heat of vaporization of water is 40.79 kJ/ mol.
When the rock is dropped from the cliff into the ocean, it travels approximately 16t^2 feet in t seconds. If splash is heard 2.5 seconds later and speed of sound is 1100ft/sec, approximately height of cliff.
Estimate the enthalpy change when 8.50L of ozone at a pressure of 1.00 atm and 25°C reacts with 12.00 L of nitric oxide at the same initial pressure and temperature?
You're planning an evaluation of a semester-long alcohol awareness campaign at your college. Previous evaluations indicate that about 25% of the students surveyed will respond "Yes" to the question "Did the campaign alter your behavior toward alco
Suppose you need to prepare the 4-methyl-2-pentyne and discover that the only alkynes on the hand are propyne and acetylene. You also have available methyl isopropyl bromide, iodide and 1,1-dichloro-3-methylbutane.
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