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A balloon is floating around outside your The temperature outside is 33, and the air pressure is 0.800 . Your neighbor, who released the balloon, tells you that he filled it with 3.10 of gas. What
a 0.150 g sample of KIO3 required 10.7 mL of Na2S2O3 solution for its standardization. What is the molarity of the Na2S2O3 solution?
What is the boiling point of a solution that contains 4.00 moles MgSO4 in 1500. grams of water. (Kb = 0.512 oC/m; give answer to 3 decimal places)
If the bullet-block system compresses the spring by a maximum of 74.0 cm, what was the speed of the bullet at impact with the block?
What would be the charge of the functional groups (α-carboxylate, α-amino, and guanidine side chain) and the net charge of arginine at pH 7?
If the volume of the cylinder is 5500 mL and the pressure of the O2 in it is 2.5 atm. (temperature is 25oC)
The flask was then shaken until the solution was uniform. A 50.0mL- sample of this glucose solution was diluted to 0.500L . How many grams of glucose are in 100.mL of the final solution?
What is the most common chemical method for removing H3O+ Ions in aquenous solution? Write a net ionic equation which describes this method.
If the volume of a container is 39.4 L. and the container holds a gas at 13.2 oC. and 7.00x104 torr. The density of the gas is 16.88 g/L.
An 11.0 gram sample of CaCl2(s) is dissolved in 125 grams of water with both substances at 25.0°C. If the final temperature of the mixture is 39.2 °C, what is the enthalpy of the dissolutio
When a 115 N bag of nails hangs motionless from a single vertical strand of rope, how much tension is exerted in the strand?
What molar ratio of sodium acetate to acetic acid should be used to prepare a buffer with pH = 4.5? Ka acetic acid = 1.8 x 10-5.
You have a stock 0.100 M solution of KMnO4 and a series of 100-mL volumetric flasks. What volumes of the stock solution will you have to pipet into the flasks to prepare standards of 1.00, 2.00, 5.0
From what height would a freely falling object reach this speed in the absence of air resistance?
Although a protein's primary sequence can be inferred from the nucleotide sequence, what are some examples of the modifications that can only be determined by direct protein sequencing?
the difference in the mass of 100 moles each of sodium atoms and sodiu ions is 5.48002g. compute the mass of an electron.
What is the magnitude of an electric field in which the electric force on a proton is equal in magnitude to its weight?
How much heat does your body lose when 2.50 of sweat evaporates from your skin at 25 ? (Assume that the sweat is only water.) The heat of vaporization of water at 25 is 44.0 .
How much energy is required to boil 45.5g of water at 100 degrees C at sea level? The molar heat of vaporization of water is 40.6 kJ/mol
Compounds X and Y have the formula C6H12. Both X and Y react with one molar equivalent of hydrogen in the presence of a palladium catalyst to form 2-methylpentane.& ; The heat of hydrogenation of X
A ship sets out to sail to a point 154 km due north. An unexpected storm blows the ship to a point 74 km due east of its starting point. In what direction must it now sail to reach its original dest
The hydrolysis(addition of water) of an ester is called saponification and is a reversible reaction. What kind of experimental conditions do you think you would need in order to carry out the revers
A toothpaste contains 0.240% by mass sodium fluoride used to prevent dental caries and 0.30% by mass triclosan, an antigingivitis agent.
Suppose that a fully charged lead-acid battery contains 1.50L of 5.00M H2SO4. What will be the concentration of H2SO4 in the battery after 3.40A of current is drawn from the battery for 4.50 hours?
A 5.0 kg bullet leaves the muzzle of a gun with a speed of 320 m/s. What force (assumed to be constant) is exerted on the bullet while it travels down the .82 m long barrel of the gun?