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The following data represent a determination by comparison with the mass of oxygen as the reference gas of the "molar mass" of a sample of air.
Determine rate charged per hour by each mechanic if sum of two rates was $120 per hour? 1st mechanic- 2nd mechanic.
The element antimony has an atomic weight of 121.757 amu and only two naturally-occurring isotopes. One isotope has an isotope mass of 120.904 amu and abundance of 57.3%. Based on these data, Calcul
Explain which solution has the greatest freezing point change? Show calculations.Two solutions are prepared using the same solute:
When the two slits in a doubles-slit experiment each consist of a width of .08 mm and a spacing of .24 mm, determine how many interference peaks will lay in the central diffraction maximum by using
Suppose you want to make 12.0 dozen cookies so you decide to make these cookies in the batches of 24.0 cookies each and each batch needs 27.0 mL of vanilla extract. Each bottle of vanilla extract ha
U.S. national average passenger car "fuel economy" is about 25 miles per gallon. With this change in national fuel-economy standard, find percent increase in "energy efficiency?"
A charge of 16 C in a lightning bolt flows in a time of 1.5 x 10-3 s. Supposing that the lightning bolt can be expressed as a long, straight line of current, determine the magnitude of the magnetic
Explain the molecular geometry including the bond angles and give the expected hybridization of the central atom for Br3 and draw the Lewis Structure.
A small sterling silver bracelet has a volume of 7.33 ml and mass of 76.0g by water displacement. Determine the mass and %Ag and the mass and %Cu in the bracelet. Suppose the volumes to be linearly
A wave consists of a wavelength of 4.9x10^-7 m and a speed of 8x0^7 m/s in a specific material. i) Find out its frequency in the material in Hz?
A plane electromagnetic sin wave having a frequency of 17MHz travels in the free space.
Write down the charge and formula of a polyatomic anion that have only oxygen and carbon and has a -2 charge.
While 20.0 wt % solutions has a density of 1.18g/mL, A 40.0 wt % solution of CsCl (FM 168.37 g/mol) has a density of 1.43 g/mL,
The two stationary positive point charges, charge 1 of magnitude 3.85 nC and charge 2 of magnitude 2.00 nC, are separated by the distance of 58.0 cm. The electron is free from rest at the point midw
It was found that 36.0 mL of 0.100 M NaOH was needed to react totally with 0.765 g of sample in the titration of an impure sample of KHP, Determine the percentage of KHP in this sample?
For the given questions, consider light within plate glass, which consists of an index of refraction of 1.523. (i) Determine the critical angle for plate glass surrounded by the air?
Assume that when he current is 17A (amperes), resistance is 10 ohms. Determine current when resistance is 85 ohms?
Diluted sample (1:20) of protein which is having 20 μL was added to 2ml of Bradford reaction assay tube. At 595 the absorbance was 0.70 and on the x-axis, according to a BSA standard curve corres
From oil wells the ethane is flamed off in abundance, because it is difficult and un-reactive to use commercially. But would it make a good fuel?
The Light rays from the Sun, which is at an angle of 34.7° over the western horizon, hit the still surface of a pond. (i) Evaluate the angle of incidence of the Sun's rays on the pond?
If 100 live bacteria make it into bloodstream through cut, how many hours, correct to nearest whole hour, it takes before bacterial population reaches the lethal level?
Fructose and Glucose are simple sugars with the molecular formula C6H12O6. Sucrose is a complex sugar with molecular formula C12H22O11 that consists of a glucose unit coralntly bound to a fruc
Both I1 and I2 are in the counter-clockwise direction. Find out the current in the outer loop (magnitude and direction) when the magnetic field at the center is 1.8 x 10^-4 T directed to the page?
By a bond of constant force 855 N m-1 suppose a hydrogen atom is absorbed on the surface of a gold nano-particle. Determine the wavelength of a photon required to excite a transition among its neig