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How would you prepare the following? (i) Ethanoid anhydride using ketene (ii) A tertiary alcohol starting from an ester`
An expandable container of oxygen gas has a volume of 12.5mL at a temperature of 26.0°C. What volume will the gas occupy at 54.0°C?
Two small sphere spaced 20.0 cm apart have equal charge. How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57x10-21 N?
If 1.25 g of sodium carbonate was dissolved in water and the solution titrated with 22.7 ml of hydrochloric acid to a medal orange end point, calculate (i) the molarity and (ii) the percent by mass (density of sution = 1.02 g/ml) of the hydrochloric acid solution
Find two numbers whose sum is 24 such that the sum of the square of one plus six times the other is a minimum.
A small jewelry box with square of base is to have a volume of 125 cu.cm. Find its dimensions to require the least amount of material.
Using thye following information: H0:=375; Ha: 375; n=100; x = 390; 2=4,900 and a =0.05. is the z-test statistic value equal to 2.14?
Calculate the molar concentration of each of the following:
a. 6.0 N sulfuric acid (in reactions that replace both hydrogens)
b. 3.5 N potassium hydroxide
c. 4.0 N phosphoric acid (in reactions that replace two hydrogen ions)
d. 6.2 N sodium hydroxide
An arrow moving at 10 m/s is stopped by a target. If the arrow has a mass of 250 g and penetrates 4 cm into the target, what is the force exerted by the arrow on the target?
What is the third harmonic of a pitch with a base frequency of 314 Hz?
#340153 on Dec 2023