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when you have a solution of potassium chlorate containing 4g at 65 degress celcius. How many additional grams of solute must be added to it to make the solution saturated?
Write complete ionic equation to show the reaction of aqueous Hg2(NO3)2 with aqueous sodium chloride to form solid Hg2Cl2 and aqueous sodium nitrate.
The combustion of 45.0 of methane (natural gas) releases 2498 of heat energy. How much energy in kilocalories would combustion of 0.500 ounces of methane release?
What is the cutoff temperature at which the reaction is spontaneous?
How much energy would be absorbed as heat by 75 g of iron when heated from 295 K to 301 K? (Cp for iron= 0.449 J/g*C)
You drop a 142-g piece of brass (density = 8.56g/cm3) into the water. To what height does the water risein the graduated cylinder?
a 125 g metal block at a temperature of 93.2 degrees Celsius was immersed in 100 g of water at 18.3 degrees celsius. Given the specific heat of metal (s= 0.900j/g x degrees celsius), find the final
A sample of air from the basement of a home is found to contain 8.3 ppm of radon. What is the partial pressure of radon in the basement if the total pressure is 755 torr? A. B. C. D. E. 6.8 104 mol
A compound contains 10.13g of C and 89.87g of Cl. Determine both the empirical and molecular formulas of the compound given that the molar mass for the molecular formula is 237g/mol.
Calculate the expected change in temperature for 4.5 g of NH4NO3 dissolved in 100.0 mL of H2O. Assume that the calorimeter absorbs no heat.
Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water?
The molar mass of corn oil is 890g/mole. How many moles and how many grams of sodium hydroxide are required to react with the 15mL (13.7g) of corn oil? Show your calculations a. Calculate the number
A sample of neon has a volume of 470 mL when it is at a pressure of 685 mmHg. What will be the volume when the pressure is increased to 1212 mmHg?
Calculate [CO32- ] in a 0.025 M solution of CO2 in water (H2CO3). If all the CO32- in this solution comes from the reaction shown below, what percentage of the H+ ions in the solution is a result of
If the pressure exerted by ozone, O3, in the stratosphere is 3.0*10^-3 atm and the temperature is 250 K, how many ozone molecules are in a liter?
Calculate the vapor pressure at 25 C of hexane above the solution. The vapor pressure of pure hexane at 25 C is 151 torr.
What is a sentence for Polyatomic Ion, Covalent Bond, Molecule, Molecular compound, Metallic Bond, Alloy, Thermal energy, and heat.
A set of data gave an average unpopped corn kernel mass of 0.12 grams. How many kernels are in a pound (454 g) of unpopped corn?
Given the following balanced equation, determine the rate of reaction with respect to [NOCl]. If the rate of Cl2 loss is 4.84 x 10-2 M/s, what is the rate of formation of NOCl?
What mass of carbon dioxide (in {rm kg}) is produced upon the complete combustion of 18.9 {rm L} of propane (approximate contents of one 5-gallon tank)? Assume that the density of the liquid propane
A 7.6730 kg ball of putty, specific heat 0.37690 J K-1 g-1, initially at 297.38 K is dropped from a height 226.46 m. What is the temperature of the putty (in K) just after hitting the ground?
A copper wire (density = 8.96 g/cm3) has a diameter of 0.50 mm. If a sample of this copper wire has a mass of 48 g, how long is the wire?
A solution is prepared by dissolving 0.16 mol of acetic acid and 0.16 mol of ammonium chloride in enough water to make 1.0 L of solution. Find the concentration of ammonia in the solution.
HFC's (hydrofluorocarbons) are replacing CFC's (chlorofluorocarbons) because the C-H and C-F bonds are stronger than C-Cl bonds. If the bond enthalpy of a C-F bond is 482 kJ/mol, what is the maximu
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.