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A sample which is having 25.5-g of an unknown metal is heated to 95.5°C and is placed in a insulated container containing the 174 g of water at a temperature of 21.0°C. After the meta
Determine to one decimal place and do not include the units with your answer. The nutritional calorie (Calorie) is equivalent to 1 kcal. One pound of body fat is equivalent to about 4.1 x 103Calorie
The CaCO3 that precipitated was filtered and oven dried. A 4.38 g sample of the CaCO3 had radioactivity of 3.2d/min. Archeologists removed pieces of charcoal from a Native American campfire,
Determine the numbers of photons at the 660 nm must be absorbed to melt the 4.0 x102 g office? (Hint: It takes 334 J to melt 1 g of ice at 0°C.)
How does the energy of these fuels compare to that of octane (C8H18) (amount of heat released by octane (kJ/kg))? Which fuel contains the most energy in the least mass?
The exit air leaves at95o F and 90oF wet bulb. Explain how much water can be cooled in the pounds per hour if the water to be cooled is not recycled, enters the tower at 120o F, and leaves
Determine the numbers of moles of HCO3- did you start with if you collect 1.24x10-3moles ofCO2 when bicarbonate is reacted with acid it releasesCO2.
Determine the numbers of moles of gas are present when you collect the 35.83mLof the gas over water at 25.3 digress Celsius and 0.97atm
What is the partial pressure of the gas that was collected? At 25.3 degress Celsius a gas sample was collected over the water. The total pressure is determined to be 0.97 atm.
Determine the wavelengths of the visible lines in the line spectrum of hydrogen using the Ryder equation (nf = 2; ni = 3, 4, 5, and 6).
Explain by what factor will the KE change if the speed of themotorcycle is decreased to 33 mph? When the rider breaks to a stop, where does the KE of the motorcycle go?
Give a logical explanation of the action of fresh apple on the hydrogen peroxide. Write down the equation for the decomposition of hydrogen peroxide.
Demonstrate the polymerization reaction. Poly (ethylene terephthalate), which is the commonly used polyester, Dacron, can be formed by an acid-catalyzed etherification between ethylene glycol (HOCH
Determine what can you say about the sign of ΔG0 for this reaction? Determine the numbers of kJ of energy will be absorbed if 197 grams of C are reacted with excess S8?
Write down the thermo chemical equation for the standard enthalpy of formation of the liquid acetic acid, CH3COOH, where given that the reaction releases 484.5 kilojoules per mole of the acetic acid.
Determine the numbers of J of heat are required to raise the temperature of 62.0g of ethylene glycol from the 13.1C to 40.5C? The specific hear of ethylene glycol is 24.2 J/g-K.
Explain how much heat energy it takes to warm 1.703 x103 L of liquid water in Kenosha's hot tub from room temperature (298 K) to 100. oF? (For this problem, consider the density of water to
Determine the numbers of grams of barium sulphate will be produced from the 100 g of sodium sulphate and 200 g of barium nitrate? Ba(NO3)2 +Na2SO4 > BaSO4 + NaNO3
Explain an experiment using only hot and cold water that would enable you to verify that the heat capacity of a coffee-cup calorimeter is about 10 Joules/Celcius(J/C). Be Specific.
Gasoline (C8H18) and ethanol (C2H5OH) are both used as automobile fuel. If gasoline is selling for $4.50 per gallon, determine the price of ethanol have to be in order to provide the same amount of
What would happen to the retention times if the column temperature was increased? If a sample containing butanone and 3-pentanone were injected into a non polar gas chromatography column, d
Determine an approximate value for Avogadro's number. Iron crystallizes in a body-centered cubic structure. The volume of one Fe atom is 8.39e-34 and the density of Fe is 7.874 g/cm3.
Calculate the highest energy conformation of the 1-bromo-2-propanol? The would Br and OH be eclipsed or Br and the methyl group?
Calculate the freezing point of benzene at the 1000 atm when benzene freezes at 5.5C its density changes from 0.879 g/cm3to 0.891g/cm3. Its enthalpy of fusion is 10.59kJ/mol.
Calculate the maximum rate of loss of water? Suppose that all the radiant energy is absorbed. In July in Los Angeles, the incident sunlight at ground level has a power density of 1.2 kW/m2&