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Estimate the uncertainty in the position of one Nitrogen molecule (N2) traveling 300 +/- 0.2 (meters per second) Assume the mass of the nitrogen molecule is 4.65x10^-23 grams. Express your answer in meters.
In a particular titration experiment a 25.0 mL sample of an unknown monoprotic acid required 30.0 mL of .200 M NaOH for the end point to be reached
What must the minimum temperature of its energy source be if it is to produce work with an efficiency of 0.75?
what is the molarity of a solution that contains 5.2g urea (molecular weight = 60 amu) in 250g of benzene?
95.0 mL of H_2O is initially at room temperature (22.0C). A chilled steel rod at 2.0C is placed in the water. If the final temperature of the system is 21.5C, what is the mass of the steel bar?
The recommended dose is 10 body weight. How many of this suspension should be given to an infant weighing 16
What volume will nitrogen gas occupy if the pressure is increased to 894 torr at constant temperature?
An environmental chemist needs a carbonate buffer of pH 10.00 to study the effects of acid rain on limestonerich soils. How many grams of Na2CO3 must she add to 1.5 L of freshly prepared 0.20 M NaHCO3 to make the buffer? KA of HCO3- is 4.7 x 10-1..
1. A corrosion technologist pipetted a 100.00 mL hard water sample and titrated it with 37.64 mL of 0.01 M EDTA solution for a total hardness endpoint, and 29.32 mL of 0.01 M EDTA solution for a calcium endpoint.
At 55.0C, what is the vapor pressure of a solution prepared by dissolving 75.8 g of LiF in 265 g of water?
How many grams of potassium nitrate are required to prepare 0.250 L of a 0.700 M solution?
Primary alcohols can be oxidized to aldehydes and carboxylic acids. Often it is difficult to stop at the aldehyde oxidation state. One method frequently used to accomplish
Calculate the number of moles of sodium hydroxide used in the titration. b. How many equivalents of unknown acid were titrated? c. Determine the equivalent mass of the unknown acid
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