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Updated: May 9, 2025
A mixture of the chlorides of sodium and potassium from 0.5000 gram of a feldspar weighs 0.1500 gram, and after solution in water requires 22.71 cc. of 0.1012 N silver nitrate for the precipitation of the chloride ions. What are the percentages of Na O and K O in the feldspar? !Answer!: 8.24% Na O; 9.14% K O. How many grams of Mn O can be obtained from 1 gram of MnO ? !Answer!: 0.8774 gram.
He went on increasing the dose up to five grams, and then his respiration became deeper, and above all he worked with a clearness of mind, an ease, which he had not known for years. A great flood of happiness, of joy in living, inundated his being.
On this basis a gram of radium in a year emits enough energy to dissociate about two hundred and twenty-five grams of water. What seems most remarkable about this constant emission of heat by the radium atom is that it does not apparently draw upon external sources for it, but maintains it by the internal energy of the atom itself.
From this time, after he had had a syringe made at Paris capable of containing five grams, he was surprised at the happy results which he obtained with his patients, whom he had on their feet again in a few days, full of energy and activity, as if endowed with new life.
In 1825, Baber of Buxur, India, spoke of a child born at six and a half months, who at the age of fifty days weighed 1 pound and 13 ounces and was 14 inches long. The longest circumference of the head was 10 inches and the shortest 9.1 inches. The child suckled freely and readily. In Spaeth's clinic there was a viable infant at six and a half months weighing 900 grams.
The ferric thiocyanate differs from the great majority of salts in that it is but very little dissociated in aqueous solutions, and the characteristic color appears to be occasioned by the formation of the un-ionized ferric salt. If the ammonium thiocyanate is used, the amount is 76.08 grams.
As an example we may take one of the varieties of wheat originated by the Minnesota Experiment Station. Hays described it as follows. It was originated from a single plant. From among 400 plants of "Blue stem" several of the best were chosen, each growing separately, a foot apart in every direction. Each of the selected plants yielded 500 or more grains of wheat, weighing 10 or more grams.
In the determination of sulphur in steel by evolving the sulphur as hydrogen sulphide, precipitating cadmium sulphide by passing the liberated hydrogen sulphide through ammoniacal cadmium chloride solution, and decomposing the CdS with acid in the presence of a measured amount of standard iodine, the following data are obtained: Sample, 5.027 grams; cc. Na S O sol. = 12.68; cc.
!Answer!: 0.4667 gram. One tenth gram of iron wire, 99.78% pure, is dissolved in hydrochloric acid and the iron oxidized completely with bromine water. How many grams of stannous chloride are there in a liter of solution if it requires 9.47 cc. to just reduce the iron in the above? What is the normal value of the stannous chloride solution as a reducing agent? !Answer!: 17.92 grams; 0.1888 N.
An adult of average weight requires each day 125 grams of proteid or building material, 500 grams of carbohydrates, 50 grams of fat. This equals, in common parlance, one pound of bread, one-half pound of meat, one-quarter pound of fat, one pound of potatoes, one-half pint of milk, one-quarter pound of eggs, assuming that one egg equals two ounces, and one-eighth pound of cheese.
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