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What will the approximate intensity of the isotope peak compared to the molecular ion peak? can any time the isotope peak be of comparable intensity?
when 4.4g of propane are burnt in excess oxygen 7.2g of water are formed. calculate the mass of water formed when 22 g of propane are burnt ?
List possible formulas of molecules with M+=100. assume that C, H, and O may be present. what kind of mass spectrometry will you use to distinguish between them?
An earth satellite moves in a circular orbit with and orbital speed of 6200m/s. Find the time of one revolution of the satellite?
An elevator starts from rest with a constant upward acceleration and moves 1 m in the first 1.8 s. A passenger in the elevator is holding a 6.1 kg bundle at the end of a vertical cord. The accelera
Assume that a particular reaction evolves 228 kJ of heat and that 40 kJ of PV work is gained by the system. What are the values of Delta E and Delta H for the system?
A 110 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 350 N. For the first 15 m the floor is frictionless, and for the next 15 m the coefficient of fricti
One way of obtaining pure sodium carbonate is through the decomposition of the mineral trona, Na5(CO3)2(HCO3)⋅2H2O, as shown in the following reaction:
The press box at a baseball park is 32.0 ft above the ground. A reporter in the press box looks at an angle of 18.0 degrees below the horizontal to see second base.n What is the horizontal distance
A leak develops some carbon dioxide escapes, leaving only 3.5 moles of carbon dioxide inside the balloon. What is the new volume of the balloon? Enter only the numeric value for your answer (no unit
When a 58 g tennis ball is served it accelerates from rest to a constant speed of 42 m/s the impact with the racket gives the ball a constant acceleration over a distance of 37 cm what is the magni
If You Analyzed Each Of The Substances NaBr, KOH, CrPO4, Pb(OH)2, RbCl, LiNO3 By Mixing Them With Water In A Beaker, Which Substance Would Be Most Likely To Fall To The Bottom Of The Beaker?
A rabbit runs in a straight line with a velocity of +1.6 m/s for a period of time, rests for 9 s, and then runs again along the same line at +0.55 m/s for an unknown amount of time. The rabbit trav
If 2.31g of the vapor of a volatile liquid is able to fill a 498-ml flask at 100 degree celius and 775 mm Hg, what is the molecule weight of the liquid? What is the density of the vapor under these
calculate the mass percent, the mole fraction, and the partial pressure of carbon dioxide after cooling back down to the initial temperature.
A quarterback takes the ball from the line of scrimmage,runs backward for 10.0 yards and then runs sideways parallel to the line of scrimmage for 15.0 yards. At the point he throws a 50.0 yards forw
If the freezing point og a 100.0g sample of 2-methyl-2-propanol is 24.59C, how many milligrams of water are present in sample(Kf(2methyl-2propanol=4.68Ckg/mol)
Calculate the free energy of hydrolysis of ATP in a rat liver cell in which the ATP, ADP and Pi concentration are 3.4, 1.3 and 4.8 mM respectively. Use R=8J/K.mol and T=25 oc
A box of mass 87 kg is at rest on a horizontal frictionless surface. A constant horizontal force then acts on the box, and accelerates it to the right. It is observed that it takes the box 3.7 secon
The mass of the crucible plus CaO (M.W 56.077 g/mol) was 26.7134 g. Calculate the concentration of Ca (MW40.078 g/mol) in the water in units of gram per 100 mL.
What is the rate of energy transfer by radiation from a metal cube 1.8 on a side that is at 720? Its emissivity is 0.40.
If 507 g FeCl2 were used up in the reaction FeCl2 + 2NaOH Fe(OH)2(s) + 2NaCl, how many grams of NaCl would be made?
A river flows due east at 1.29 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant veolocity of 11.0 m/s due north relative to the water. If the river is
What is the pressure if the volume of the container is maintained constant and the temperature is raised to 383 degrees C?
Determine the speed of transverse waves on a string under a tension of 80.0 N if the string has a length of 2.00 m and a mass of 5.00 g. (b) Calculate the power required togenerate these waves if th