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a gas sample in an open manometer system has a pressure of 530 mmHg . The mercury column has a height of 545 mm on the gas sample side and a height of 425 mm on the air pressure side. what is the value of the air pressure in mmHg?
calculate enthalpy change for the quantity of zinc reacted. Be sure to follow the significant figures convention in the answer you report.
Now take another 37 mL of the 0.50 M pH 6.83 buffer and add 1.3 mL of 1.00 M NaOH. Using steps similar to those above, calculate the new pH of the solution.
Important information about balanced chemical equation, 1. If 1 mole of Al4C3 has a mass of 144g and carbon has a mass of 12g, what is the atomic mass of aluminum?
Calculate the value of the reaction quotient Q. (b) Is the system at equilibrium? If not, predict which way (right or left) the reaction will proceed to reach equilibrium.
what is the formula used to determine the mass of KClO3 to form a saturated solution in 250g of water at 30 degrees celcius
Consider the weak acid, with a Ka = (4.40x10^-4). In the titration of 25.00 mL of a 0.01000 M solution of the acid with 25.00 mL of a 0.01000 M solution of NaOH
It takes 49.0 J to raise the temperature of a 9.60 g piece of unknown metal from 13.0 degrees celsius to 24.5 degrees celsius. what is the specific heat for the metal?
How can I make up 100ml of a solution containing Compound A (solid, purity of 83.7%) at 90 ug/ml and compound B (liquid, density 1.12 and purity of 90.5) at 30 ug/mL for HPLC reference standard.
Suppose y was measured five times and average of these five measurements was 3.75. What is the uncertainty in x based on these five measurements?
aluminum and oxygen react to form aluminum oxide. How many L of oxygen at 296K and 1.4 atm of pressure are necessary to form 3.25g of aluminum oxide.
what is the mole fraction of hydrogen in a gaseous mixture that consists of 8.00 g of hydrogen and 12.00 g of neon in a 3.5 liter container maintained at 35.20 degrees celsius?
The amount of heat needed to raise the temperature of 25 g of a substance by 15°C is 915 J. What is the specific heat of the substance?
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