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The energy of one mole of photons having a wavelength of 630 nm is: a. 295 kJ, b. 232 kJ, c. 515 kJ, d. 190 kJ, e. 331 kJ
In a calorimeter, 10.0 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed?
Combustion analysis of a 13.42 g sample of equilin which contains only carbon, hydrogen, and oxygen produced 39.61 g CO2 and 9.01 g H2O. The molar mass of equilin is 268.34 g/mol. Find the molecular formula for equilin.
The reaction takes place in a bomb calorimeter where 4.50g of glucose are burned. What is the heat capacity of the bomb if the temp. of the water in the bomb increases from 22.75 degrees Celsius to 25.32 degrees Celsius? I used qrxn = -Ccal*change..
For the following reaction, 6.72 grams of chlorine gas are mixed with excess water. The reaction yields 5.13 grams of hydrochloric acid.
What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 87.0 mL of 0.0601 M NaOH and 71.0 mL of 0.0138 M Ba(OH)2
As a separation and detection method, would TLC or paper chromatography yield better results in the analysis of each of the following pairs of compounds
Based on the stoichiometry, at what point does the limiting reactant change? show calculations to support your answer. The volume of acid HCL (10mL) is constant and mass of metal Mg (0.250g) is constant.
a sample of gas at 77 degreees celsius and 1.03 atm occupies a volume of 2.02L. What volume would this gas occupy at 107 degreees celcius and 0.789 atm.
a quantity of water is heated from 25.0 C to 36.4 C by absorbing 325 joules. what is the mass of the water?
Find the weight percent copper in the salt. Would you help me to sort out this question? A 3.026 gram portion of Cu(II) salt was dissolved in a 250 ml volumetric flask. A 25.0mL
If 100 g of Mg reacts with excess HCl, what volume of hydrogen gas at 25 degrees C and 1.0 atm pressure will be produced. balanced equation
why is it important to have gas laws relating to this hypothetical situation?
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