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Mendeleev noticed that properties of elements generally repeated at regular intervals when the elements were arranged in order of increasing
Nylon is a synthetic polymer made up of amide linkages formed when a diacid condenses with a diamine. The different types of nylons are identified by the number of carbons possessed in the diamine
An athlete wants to acquire red blood cells from a donor with the same blood type. Taking into consideration that blood is composed of three components, plama, red blood cells, and leukocytes. what instrument have used in our lab experiments that ..
Draw the structure for the following and report what conformation will be favored over the other cis-1,2-dimethylcyclohexane trans
what percentage of HSO4- is dissociated in 2M solution? Why does molarity approximate molality at low concentrations?
Calculate the work in kilojoules done during a synthesis of ammonia in which the volume contracts from 7.6 L to 4.6 Lat a constant external pressure of 41atm.
Hexachlorophene is used as a disinfectant in germicidal soaps. What mass of hexachlorophene (molar mass = 406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C?
Equilibrium shift of the reaction and the pH of solution, 1. The pressure on each of the following systems is decreased from 5 atm to 1 atm. Which way does the equilibrium shift in each of the following systems?
To prepare a fertilizer, an engineer dilutes a stock solution of sulfuric acid by adding 23.0 L of 4.75 M acid to enough water to make 500. L. What is the mass of sulfuric acid per milliliter of the diluted solution
Chlorine gas reacts violently with sodium metal. Write the balanced reaction to answer the question. How many grams of sodium are required to completely react with 2.85 L of chlorine at 4.25 atm and 36oC
how many grams of water are formed when 5.00 g of butanol combust with excess oxygen according to the reaction shown
A gas mixture is made by combining 7.9 g each of Ar and Ne and an unknown diatomic gas. At STP the mixture occupies a volume of 18.73 L.
What partial pressure of oxygen above the water (in atmospheres at 0 C) is needed to obtain this concentration [4mg/L]? The solubility of O2 in water at 0C and 1 atm partial pressure is 2.21*10^- 3 mol/L.
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