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If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room?
What is the molarity of the solution if 310 of the solution reacts with magnesium to produce 7.40 of gas measured at STP?
Ethylene gycol has a density of 1.11g/mL. What is the volume of 30.0 g of ethylene glycol?
The heat energy required to melt 1.00 g of ice at 0 degrees C is 333J. If one ice cube has a mass of 62.0 g, and a tray contains 16 ice cubes, what quantity of energy is required to melt a tray of ice cubes to form liquid water at 0 degrees C
2Al(s)+2KOH(aq)+6H2)-->2KAl(OH)4(aq)+3H2(g) If you place 2.05 g of aluminum in a beaker with 185 ml of 1.35 M KOH, will any aluminum reamin. What mass of KAl(OH)4 will be produced
If the binding energy of an electron in a hydrogen atom is 6.41?10^-19 J, what wavelength of photon is required to liberate it from the atom? Planck's constant = 6.626 ? 10^-34 J×s; c = 3.00?10^8 m/s
the boyle temperature is the temperature at which the coefficient b is zero. Therefore, a real gas behaves like an ideal gas at this temperature. (a) Give a physical interpretation of this behavior.
If you weigh .25g of an antacid tablet that weighs 1.42g, what percentage of the tablet have you used? If the tablet contains 250 mg of CaCO3, what mass of CaCO3 do you have in your measured portion
Solve an equilibrium problem (using an ICE table) to calculate the pH 1)a solution that is 0.13M in NH3 and 0.15M in NH4Cl 2) 185.0 mL of 0.12M C2H5NH2 with 265 mL of 0.20M C2H5NH3Cl
From the understanding of colligative properties, how would I design an experiment to measure the freezing point of a material which freezed at -2'c using the same apparatus used in the laboratory and any chemical reagents commonly found in a chem..
6Na+Fe2O3->3Na2O+ 2Fe. If you are provided 20.0 moles of sodium & excess iron (III) oxide, how many moles of iron would form?
The rate constants of some reactions double with every 10 degree rise in temperature. Assume that a reaction takes place at 315 K and 325 K. What must the activation energy be for the rate constant to double as described
The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00\times10..
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