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A mixture contains two species (A and B) with the following molar absorptivities:ελ [M-1·cm-1]λ [nm] A B479 2 290 4 170533 1 730 3 540 The measured absorbance of the mixture in a 1.00 cm cell was 0.400 at 479 nm and0.315 at 533 nm. Calculate the concentrations of A and B in the mixture.
Question- The propane fuel (C3H8) used in gas barbeques burns according to the following thermochemical equation-
what is the percent Zn in the mixture? (At the same temperature and pressure, the Mg/HCl reaction gave 24.2 L gas/mol Mg.)
The temperature of the calorimeter rose from 25C to 33.73C. If the heat capacity of the calorimeter was 9,630 J/C, what is the value of delta H for the combustion reaction in KJ/mol.
Carbon-14 has a half-life of 5730 yrs. A living organism has an activity of 15.2 counts per minute (cpm) per gram of carbon. If a bone is determined to have an activity of 3.80 cpm per gram of carbon, how old is the bone
The volume of a sample of hydrogen is 798mL and it exerts 621mmHg pressure at 5.00C. what volume does it occupy at standard temperature and pressure.
A student studied the clock reaction described in this experiment. She set up Reaction Mixture 2 by mixing 20 mL of 0.010 M KI, 10 mL 0.001 M Na2S2O3, 10 mL 0.040 M KBrO3, and 10 mL 0.10 M HCl using the procedure given. It took about 45 seconds fo..
A sample of neon gas used in a neon sign occupies a volume of 1.50 L at a pressure of 630 torr. Calculate the volume of the gas if the pressure in the glass tube of the sign is 793 torr.
Calculate the number of moles of NaHCO3 that reacted in each beaker. (The molar ratio between evolved CO2 and the bicarbonate is 1:1.
an aluminum cup contains 225 g of water and a 40 g copper stirrer all at 27degc. a 420 g sample of silver at an initial
Question- Why would you not want to use tap water in making up the solvent mixture (HCI + acetone) or rinsing out the beaker
At 25 degrees C, what are the molar H3O+ and OH- concentrations in (e) 0.200 M NaOCl? (f) 0.0860 M CH3CH2COONa
what is the impact of a catalyst on the rate and equilibrium of a general chemical
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