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Consider a regression situation in which y = hardness of molded plastic and x = amount of time elapsed since termination of the molding process. Summary quantities included the following.
n = 16, SSResid = 1236.43, and SSTo = 25,320.368. (a) Calculate a point estimate of σ. (Give the answer to three decimal places.)
On how many degrees of freedom is the estimate based?
(b) What proportion of observed variation in hardness can be explained by the simple linear regression model relationship between hardness and elapsed time? (Give the answer to three decimal places.)
Calculate the mass of air in an air-filled tire. Part B: Calculate the mass of helium in a helium-filled tire. Part C: What is the mass difference between the two?
to determine the number of molecules present in air using the ideal gas law and avogadros number.assuming that air
Draw the crystal-field energy level diagram for the 3d obitals and show the placement of d electrons assuming this is a weak-field complex ion.
if a open-tube manometer contains a non volatile silicone oil density1.30 gcm3 instead of mercury 13.6 gcm3 what are
Compute the vapor pressure at 25 °C if it is given that the density of H 2 O=0.9971 g/mL , vapor pressure of H 2 O=23.76 torr, molar mass of sucrose, = 342.3 g/mol,
acetone is one of the most important solvents in organicchemistry used to dissolve from fats and waxes to airplane
Write the reaction of crystal violet with HCl and explain why HCl quickens the elution of crystal violet
State a beaker contains 100. mL of 0.0640 M H2SO4. Define what volume of 0.0470 M KOH solution is needed to exactly neutralize the acid
A certain indicator HA has a ka value of 1.6x10-7. The protonated form of the indicator is blue as well as the ionized form is red. 1) Explain what is the pka of the idicator
How would you distinguish experimentally between an amphourous, a crystalline and a crosslinked polymer
2.00 x10^2 mL of .500 M HCl is mixed with 2.00 x 10^2 mL of .250 M Ba(OH)2. how many moles of water are produced in the reaction
CaO + C --> CaC2 + CO2 [unbalanced] If 244 g of CaO is combined with 318 g C, how many grams of CO2 could be produced if the reaction goes to completion
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