What is the chemical oxygen demand
A 25.0 mL sample of river water was titrated with 0.0010 M Na2Cr2O7 and required 8.3 mL to reach the end-point. What is the chemical oxygen demand, in milligrams of O2 per liter, of the sample?
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If gasoline is selling for $3.20/gal, what would the price of ethanol have to be in order to provide the same amount of heat per dollar? The density and delta H defrees F o octane are 0.7025 g/ml and -249.9 kJ/mol and of ethanol are 0.7894 and -27
A sample of neon has a volume of 610 mL when it is at a pressure of 867 mmHg. What will be the volume when the pressure is increased to 1760 mmHg.
Compute the change in temperature when 1.8 g of sodium chloride is dissolved in 300.0 mL of water initially at 20C. The heat capacity of water is 4.184 J/mL/K. Neglect the heat capacity of the NaCl.
Given that is the central atom, draw a Lewis structure of in which the formal charges of all atoms are zero. Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons.
Assignment must be original, fresh work in APA format w/3-4 reerences will pAY$15 You are a manager in a fictitious company of your choice. Your director has asked you to explain to the department staff the different types of budgets and techniques
What is the freezing point of a solution of sodium chloride that contains 97.0 g NaCl dissolved in 545 g of water? Use molar masses with at least as many significant figures as the data given.
One of the most important enzymes in the world is nitrgoenase, the plant protein that catalyzes nitrogen fixation. The enzyme contains active clusters of iron, sulfur, and molybdenum atoms. Crystalline molybdenum (Mo) has a body-centered cubic uni
In a reaction between pure acetic acid and sodium bicarbonate, 11.2 grams of sodium bicarbonate was added to 21.0 mL of acetic acid. How many moles of carbon dioxide do you expect to be produced?
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