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In an insulated container, a hot piece of iron (cp =0.4513 J/g-C) at 1490. C was added to 200. g of water (cp =4.184 J/g-C) at 20. C. The temperature of the resulting mixture became 90. C. What mass of iron was present?
Calculate the molar solubility of thallium chloride in 0.20M NaCl at 25 degrees Celcius. Ksp for TICl is 1.7 x 10 -4. What volume of 0.500 M HNO3 is needed to titrate 60.00 mL of 0.500 M Ca(OH)2 to the equivalence point?
A gas sample containing 1.47 mol at 25°C exerts a pressure of 401 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr,
Styrene, a compound substance used to make Styrofoam® cups and insulation, contains 92.3 and 7.7 by mass and has a molar mass of 104 . What's the empirical formula?
Assume that the kinetic energy of a 1300kg car moving at 140km/h could be converted entirely into heat. How much water is created in grams?
Why is the installation of an automatic sprinkling system recommended in machine shops that use lathes to fabricate titanium parts?
A 2.60 mole quantity of NOCl was initially in a 1.50 L reaction chamber at 400°C. After equilibrium was established, it was found that 22.0 percent of the NOCl had dissociated
one heating 5.03 g of hydrate barium chloride, 4.23 g is left behind. what is the name of this hydrate?
When 0.228 g of the hydrate ZnSO4•xH2O is heated, 0.128 grams of anhydrous ZnSO4 remains. What is the value of x in the formula for the hydrate?
What masses of calcium sulfate and phosphoric acid can be produced from the reaction of 1.0kg calcium phosphate with 1.0kg concentrated sulfuric acid (98% H2SO4 by mass)?
how many cans of Mountain Lightning would an individual have to drink to die from a tartrazine overdose If the LD50 of tartrazine in humans is supposed to be 12,750 mg/kg (as it is for mice) and the average human weighs 70 kilograms,?
A sample of sodium reacts completely with 0.142kg of chlorine, forming 234g of sodium chloride. What mass of sodium reacted?
Calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400 g of water
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