Chemistry Inorganic Chemistry Level: Misc Level
What Volume of 0.200 M HCI solution is needed to exactly neutralize 25.0 ML of 0.150 M NaOH solution?
Chemistry Inorganic Chemistry Level: Misc Level
Calculate the new concentraion (molarity) that results when 250. ML of water is added to 125 MLof 0.251 M HCI
Chemistry Inorganic Chemistry Level: Misc Level
Calculate the number of moles and number of grams of HCI contained in 1.29 L of 0.411 M H CI
Chemistry Inorganic Chemistry Level: Misc Level
How many grams of sugar are contained in 250. g of an aqueous mixture that contains (by mass) 10.% sugar and 5.0% alcohol. ?
Physics Properties Of Matter Level: Misc Level
Although water and ammonia differ in molar mass by only one unit , the boiling point of water is over 100 degrees Celsius than that of ammonia. Please explain why.
Chemistry Inorganic Chemistry Level: Misc Level
Potassium permanganate , KMn04, is produced commercially by oxidising aqueous potassium manganate, K2MnO4, with chlorine gas.The chemical equation is:
2MnO42-(aq)+ CI2(g) +2K+ (aq) -> 2KMn04 (s) +2CI- (aq)
What volume of CI2 (g), measured at STP, is needed to produce 10.0 g of KMn04?
Physics Properties Of Matter Level: Misc Level
If 3.25 mol of argon gas occupies a volume of 100. L at a particular temperature and pressure, what volume does 14. 15 mol of argon occupy under the same conditions?
Physics Waves And Oscillations Level: Misc Level
A pipe open at both ends has a fundamental frequency of 300 Hz when the temperature is 0 degrees C.a. what is the length of the pipe? b. what is the fundamental frequency at a temperature of 30 degrees c.?
Physics Waves And Oscillations Level: Misc Level
The overall length of a piccolo is 32. cm. The resonating air column vibrates as in a pipe that is open at both ends. a. Find the frequency of the lowest note a piccolo can play, assuming the speed of sound in air is 340 m/s. b. opening holes in the side effectively shortens the length of the resonant column. If the highest note a piccolo can sound is 4000 Hz, find the distance between adjacent antinodes for this mode of vibration.
Physics Waves And Oscillations Level: Misc Level
Resonance of sound waves can be produced within an aluminum rod by holding the rod at its midpoint and stroking it with an alcohol- saturated paper towel. In this resonace modee, the middle of the rod is a node while the ends are antinodes: no other nodes or antinodes are present. what is the frequency of the resonance if the rod is 1.00 m long?
Physics Waves And Oscillations Level: Misc Level
An outside loudspeaker (considered a smsll source) emits sound waves with a power output of 100 w. a. Find the intensity 10.0 m from the source. b. Find the intensity level in decibels at that distance. c. At what distance would you experience the sound at the threshold of pain, 120 dB?
Physics Waves And Oscillations Level: Misc Level
Two sounds have measured intensities of I1 =100 W/m squared and I2 =200 W/m squared. By how many decibels is the level of sound 1 lower than that of sound 2 ?
Physics Waves And Oscillations Level: Misc Level
The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. The sound level of this creature has been measured as high as 100 dB. a. Calculate the intensity of the sound wave emitted. b. what is the intensity level if three of these fish try to imitate three frogs by saying" Budweiser" at the same time.
Physics Waves And Oscillations Level: Misc Level
The range of human hearing extends from approximately 20 Hz to 20000 Hz. Find the wavelengths of these extremes at a temperature of 27 degrees C.
Physics Waves And Oscillations Level: Misc Level
Suppose that you hear a clap of thunder 16.2 s after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s and the speed of light in air is 3.00x10 to the eighth power m/s. How far are you from the lightning stroke?
