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10.9g of ice at 0.00 degrees C is mixed with 50.0g of water at 32.0 degrees C. What is the final temperature of the mixture? (heat of fusion=333J/g; specific heats: ice=2.09J/gK; water=4.184J/gK
A 10mL sample of aquarium water was treated with reagents to form a colour, and after dilution to 100 mL was found to have an absorbance of 0.162. calculate the concentration in ppm of nitrite in the aquarium water.
Assume that 0.406 mol Carbon (g) is placed in a cylinder that is expanding. The barometric pressure on the outside of the cylinder is constant at 1.00 atm and the temperature is 300.0 K.
What is the molarity of a NaOH solution if 28.2 mL of a 0.112 M H2SO4 solution is required to neutralize a 25.0-mL sample of the NaOH solution?
How much energy is needed to raise the temperature of 16.0g of gold by 17.0degrees C, Answer in units of J
It is important to know if a particular molecule is composed of elements with different electronegativities as well as the structure of the particular molecule to explain the physical properties of the molecule.
Pheromones are compounds secreted by the females of many insect species to attract males. One of these compounds contains 80.78 percent C, 13.56 percent H
How much heat is absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon in the reaction below? Change in H degrees for the reaction is +624.6 kJ. SiO2 (g) + 3C (s) -> SiC (s) + 2CO (g)
The initial mass of the crude ether was 141mg. The mass after recrystallization was 121mg. Calculate the percent recovery from recrystallization.
CH4(g) + 3 Cl2(g) CHCl3(g) + 3 HCl(g) How many grams of CH4 is needed to produce 43.0 g CHCl3?
An unknown gas having a mass of 2.041 g occupies a volume of 1.15 liters at 0.974 atm and 20 degrees Celcius. Calculate the molar mass of the unknown gas.
One mechanism of fragmentation is loss of a neutral radical by cleavage of a bond from which one electron lost. What is the m/z ratio of the most stable cationic fragment that can be generated from dexchlorpheniramine by this mechanism?
Ionization energy is the energy required to remove an electron from an atom in the gas phase. The ionization energy of lead is 715.0 kJ/mol.
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