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Assume that the kinetic energy of a 1200 kg car moving at 100 km/h could be converted entirely into heat. What amount of water could be heated from 17 °C to 53 °C by the car's energy?
how many liters of O2 can be made from 342 g H2O2 if the density of O2 is 1.428 g/L?
When 36.5 mL of 0.585 M H2SO4 is added to 36.5 mL of 1.17 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate pH of this reaction.
The proper concentration for an intravenous NaCl solution is 0.90 g NaCl per 100 mL of water (sometimes refered to as 0.90% m/v).
What amount of H2 (in moles) is needed to inflate it to 1.0 atm in an ambient temperature of 25°C at sea level? mol. What mass can the balloon lift at sea level, where the density of air is 1.22 kg m-3? kg
Explain which method is more sensitive fluorescence or absorption spectroscopy? Explain your result. Define the difference between fluorescence and phosphorescence.
0.50 mol of argon gas is admitted to an evacuated container at 20 degrees Celsius. The gas then undergoes an isobaric heating to a temperature of 280 degrees Celsius. What is the final volume of the gas?
in the fermentation of glucose wine making a volume of 780 gas was produced at 37 and
We have to measure the volume of O2 gas produced from the mixture of H2O2 and bleach (NaOCl). Based on the moles of reactants used and the volume of oxygen gas, how do determine the stoichiometry of the chemical equation?
a 120g sample of an unknown substance was heated from 15oc to 30oc. the substance absorbed 458 joules of energy. what
Calculate the amount of solute needed to prepare 50.0 mL of a solution of 0.15 M malonic acid (CH2(COOH)2) and 0.020 M MnSO4*H2O.
Gold has cubic crystals whose unit cell has an edge length of 407.9 pm. The density of the metal is 19.3 g/cm3. Calculate the number of gold atoms in a unit cell. What type of cubi lattice does gold have
When 0.512 grams of a substance is dissolved in 7.03 grams of naphthalene, the solution has a freezing point of 75 degrees celcius. What is the molar mass of the substance. Kfp for naphthalene is 6.80 degrees celcius/kg/mole.
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