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A 20.29 g sample of impure MgCO3 is completely decomposed at 1000oC in previously evacuated 2.0 L reaction vessel. After the reaction was complete the solid residue had a mass of 15.9 g.
Give the structure of a hydrocarbon that has six carbon atoms and three vinylic hydrogens and two allylic hydrogens
Draw a possible Lewis structure for a IF7 molecule. List two possible names for this shape. What hybridized orbitals are used by the central iodine atom in this molecule
Find the drift velocity of conduction electrons in a gold wire of diameter 2.88 mm when a current of 0.123 A flows in it
The sample is diluted with 72.178 g of water. A 14.024 g aliquot of this solution is then titrated with 0.1097 M HCl. It required 29.55 mL of the HCl solution to reach the methyl red endpoint. Calcu
Suppose that a particle accelerator is used to move two beams of particles in opposite directions. what is the magnitude of the average current in this region
EDTA is utilized to slow microbial degradation of mayonnaise by preventing bacterial uptake of iron. Assuming that mayonnaise has a pH of 3.9 and a total iron content of 10-6 mole/liter, how much ED
A simple and common technique for accelerating electrons is shown in the figure, where there is a uniform electric field between two plates. Calculate the horizontal component of the acceleration
Calculate the proton motive force across the inner mitochondrial membrane a 25 degrees C when theelectrical difference is -0.18 V (inside negative), pH outside us 6.7, and pH inside is 7.5.
A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. What is the total time the hare is moving
A positive point charge Q1 = 2.8×10?5C is fixed at the origin of coordinates, and a negative charge Q2 = ?5.5×10?6C is fixed to the xaxis at x=+1.5m. Find the location of the place(s) al
A 0.24ml sample of a weak acid with an unknown pKa was combined with 12.0ml of a 3.20M KOH and the resulting was diluted to 1.500L. The measured pH of the solution was 3.75. What is the pKa of the w
Select the correct IUPAC name for the following organic substrate, including the R or S designation where appropriate, and draw the major organic product(s) for the SN1 reaction.
An inexperience novice pilot was taking his brand new Cessna Skyhawk-172R plane for a trip from Tallahassee to Atlanta, which is 375 km due north. What is the speed of the plane in still air
A Japan Airlines Boeing 747 accelerates from rest to lift-off speed of 78.51 m/s in 28.20 s. What is the mass of the plane
After completing the orbital diagram of each element, determine the number of unpaired electrons for the following elements: Titanium Phosphorus Copper Selenium Fe+2 Na+ Mn+4 Cl+3
A moving particle encounters an external electric field that decreases its kinetic energy from 8560 eV to 7750 eV as the particle moves from position A to position B. Determine the charge of the par
The complete electron configuration of: Beryllium Fluorine Aluminum The noble gas configuration of: Iron Yttrium Bromine Fe+3 Ba+2 As-3
A ball is shot from the ground into the air. At a height of 8.6 m, the velocity is observed to be v = (8.1)i + (5.3)j in meters per second (i horizontal, j upward). To what maximum height will the b
Match the quantum numbers with the corresponding shell and subshell or invalid if the quantum numbers are not a valid set.
Assume the only MgCO3 could produce gas CO2 what percent of original sample was magnesium carbonate? What was the pressure of the CO2 produced
A ball is thrown horizontally from a height of 19.8 m and hits the ground with a speed that is three times its initial speed
Suppose you want to heat air in your house with methane (CH4). Assume your house has 275 m2 of floor area and that ceiling is 2.50 m from the floor.
A cannonball is shot (from ground level) with an initial horizontal velocity of 36 m/s and an initial vertical velocity of 21 m/s. What is the initial speed of the cannonball
Each of 2 front tires in the car is filled with a different gas. One tire contains 116 g of helium, another tire has 160 g of unknown gas. How many times heavier is a molecule of the unknown gas tha