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To compare two photolithography processes (A and B), 4 of 8 wafers were randomly assigned to each. The electrically measured line width of several NMOS transistors gave the following averages (in µm):
Assuming that the processes have the same standard deviation, calculate the significance for the comparison of means.
Calculate the amount of heat required to completely sublime 23.0gof solid dry ice(CO2)at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3kJ/mol.
Zinc metal reacts with hydrochloric acid to produce zinc (II) chloride and hydrogen gas. How many liters of hydrogen gas will be produced at STP when 10.00 g of zinc metal is added to a 30.0 mL of a 0.500 M hydrochloric acid solution
a dilute aqueous solution of an organic compound soluble inwater is formed by dissolving 2.35 g of the compound in
in general most substances melt at a higher temperature as pressure is increased except water. justify this behavior
Question- a ph meter reads 0.386 v when placed in a standard buffer of PH= 4.000. When placed in an unknown solution, the metter reads 0.498V. What is the PH of the unknown solution
What temperature would have to be maintained to have 1.4 moles of CO2, at 78 kPa, occupy a volume of 22.4 L
The rate constant of a reaction is 7.50*10-5 L/mol·s at 195°C and 5.30*10-3 L/mol·s at 258°C. What is the activation energy of the reaction, in kJ/mol
Calculate the ratio of the hydronium ion in acid rain to that in normal rain.
Would a solution of diethylammonium chloride be acidic, neutral or basic. Explain briefly, include any relevant equations
A 0.0989 g sample of an alcohol is burn in oxygen to yield 0.2160 g Co2 and 0.1194 g H2o. Calculate the mass percentage of C, H, and O in the compound
What is the maximum age of a sample that can be measured by 14C dating if the error of measurement is 0.5%
Write lewis structures for each of the following species. Use expanded octects as necessary.
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