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If 1.3g of sodium reacted with 1.8g of water what would be the total mass of sodium hydroxide and hydrogen produced?
The police officer, knowing that the coefficient of kinetic friction between tires and road is 0.80, calculates the speed of the sports car at impact.
Calculate the resulting pH if 455 mL of 0.200 M HCl is mixed with 315 mL of 0.0850 M Ca(OH)2.
The punter on a football team tries to kick a football so that it stays in the air for a long "hang time". If the ball is kicked with an initial velocity of 25.0 m/s at an angle of 60.0 degrees abov
What is the percentage yield if 465 grams of hydrogen reacted with excess nitrogen and 455 grams of ammonia is formed N2 (g) + 3 H2 (g) 2NH3(g)
By combining your answers in A and B, and using average bond enthalpies for C-H, calculate average bond enthalpies of the carbon-carbon bonds in C6H6(g).
A 29.0-g sample of water at 260. K is mixed with 48.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
A molecule of ammonia, NH3, and a molecule of methane, CH4, each have 4 electron domains. Draw or describe the Lewis dot structures for each of these molecules.
Three equal point charges, each with charge 1.85 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.250 m. What is the electric potential energy U of the system?
Draw the structure of the bromohydrin formed when (E)-2-hexene reacts with Br2/H2O. Draw each stereoisomer as a separate structure, using wedge and dash bonds to indicate stereochemistry.
The background LSC vial gave 1.2 cpm. Calculate the 239Pu concentration in molarity, and the associated uncertainty. Assume 100% efficiency for LSC, and (+ or -)0.5mL as the micropipette uncertainty
Pervaporation is used to produce nearly pure ethanol from a feed with 90 percent ethanol and 10 percent water. the feed enters at 80C, and the design calls for reheating the liquid after the tempera
A 25.0-mL sample of 0.150 M butanoic acid is titrated with a 0.150 M NaOH solution. What is the pH before any base is added? The Ka of butanoic acid is 1.5 x 10-5.
You tie a cord to a pail of water, and you swing the pail in a vertical circle of radius 0.600 . What minimum speed must you give the pail at the highest point of the circle if no water is to spill
Calculate the volume of 1M HCIO4 needed to lower the ph to 2.5; for a sample starting at ph 4, 7, and 10. Considering that there are 83 samples, about how much HCIO4 shoud you bring to the lab?
A 265 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30 degrees with respect to the horizontal. The coefficient of kinetic frictio
how many grams of cuso4 are there in 219 grams of an aqeous solution that is 20.2% by weight cuso4?
If the acceleration is constant, how much time elapses while the auto moves the 180 ft.
Which of the following statements is incorrect regarding a 320 g sample of gaseous sulfur dioxide at 0 °C and 760 mmHg pressure?
What are three obvious sources of error in experiments that use foam cups as calorimeters?
Peonin is a red pigment found in the petals of peony flowers why do you think peonin is bonded to two hexoses?what monosaccharides would be produced by acid-catalyzed hydrolysis of peonin ?
A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 230 J from 440 J. How high does she rise during this
What is the difference between VBT and VSEPR theory?
Calculate the mass in grams of 5.20 moles of ethylene glycol (C2H6O2)
Titrating this sample with a 0.005M NaOh required 7.3mL of NaOH solution to reach the endpoint. What is the pH of the lake?