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Briefly explain why precipitates are usually rinsed with distilled water before they are tested further.?
A chemist needs to determine the concentration of a solution of nitric acid, HNO_3. She puts 865 mL of the acid in a flask along with a few drops of indicator
What should the mole percent of oxygen be in the diving gas for the partial pressure of oxygen in the mixture to be 0.21 atm, the same as in air at 1 atm
How do I calculate Apparent volume of dry sand and Actual volume occupied by sand particles Using the data below? Also need to know how to calculate the density of sand(based on apparent volume) Mass of graduated cylinder + Table Sand = 26.1g Mass..
A 0.5485 g solid mixture have only ferrous chloride hexahydrate and ferrous ammonium sulfate hexahydrate. dissolved in 1M sulphuric acid get oxidized to Fe3+ with hydrogen peroxide, and get precipitated with cupferron.
What mass of carbon dioxide (in kg) is produced upon the complete combustion of a typical tank of propane containi 18.9 L. The density of the propane is 0.621 g/ mL Hint: begin by writing a balanced rquation for the combustion reaction.
It then gives off a photon having a wavelength of 4.10 × 102 nm. What is the final state of the hydrogen atom? Values for physical constants can be found here.
a chemist makes a solution of 1.33 mol cacl2 and 800 kg water and then discovers that the freezing point of the
consider the reaction of 215ml 2.15M nitric acid with 26.0 g of solid iron(2) carbonate for the following questions 1. write the balanced chemical equation for this reaction 2. which reactant is the limiting reactnat?
Calculate the change in entropy (in J/K) when 81.8 g of water is heated from 27.9 ºC to 87.8 ºC at 1 atm. (The specific heat is 4.184 J/(g-K).)
The following compound has two stereoisomers. One has a dipole of 0 D, and the other has a dipole moment of 2.95 D. Draw the structure of the stereoisomer with dipole moment of 0 D.
What is the reduction half-reaction for the following overall cell reaction? Pb 2+(aq) + 2 Ag(s) ? Pb(s) + 2 Ag+(aq) Choose one: Pb 2+(aq) + 2 e- ? Pb(s) Ag(s) + e- ? Ag+(aq) Pb 2+(aq) + e- ? Pb(s) Ag+(aq) + e- ? Ag(s)
How many grams of oxygen are collected in a reaction where 222 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?
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