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A solution containing 55.7g of sodium chloride dissolved in 225 g of water has a density of 1.98g/ml. Calculate the mass percentage of sodium chloride
How many atoms are contained in one unit cell of of this element? The atomic mass of the element is 193.5 amu.
Assume that each photon has sufficient energy to eject one electron. (Note currents are reported as positive values.)
How do you write structural formulas for all the constitutionally isomeric compounds having the given molecular formula C3H9N,
How much heat energy is required to raise the temperature of 0.368 of copper from 23.0 to 60.0 ? The specific heat of copper is 0.0920 .
calculate the molar mass of the solute (acetic acid) and suggest what the structure might be.
Compute the increase in entropy when 3.50 moles of an ideal gas is heated from 250 K to 700 K and simultaneously expanded
Fumaric acid, which occurs in many plants, contains 41.4% C, 3.47% H, and 55.1% O by mass. A 0.5 mol sample of this compound has a mass of 58.0 g.
The relative electrophoretic mobilities of a 30-kd protein and a 92-kd protein used as standars on an SDS polyacrylamide gel are 0.80 and 0.41, respectively.
Draw the molecule by placing atoms on the grid and connecting them with bonds. If there is more than one answer, draw all o
determine the actual yield If the percent yield of the reaction in B was 91% describes the oxidation of ethanol (C 2 H 5 OH) to acetic acid (CH 3 COOH) by potassium permanganate (KMn04
A certain organic compound was burned, producing 1.481 g of CO2 and 0.303 g of H2O. The mass of the original sample was 0.438 g. What is the empirical formula of the compound?
Calculate approximately the heat released when you are given a chemical equation as 2-methyl-1-propene CH 3 ) 2 C CH 2 reacts
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