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Determine the mass of substance C that will form when 45.0 grams of substance A reacts with 23.0 grams of substance B. (Assume that the reaction between A and B goes to completion.) Substance A is a gray solid that consists of an alkaline earth metal and carbon (37.5% by mass). It reacts with substance B to produce substances C and D. Forty million trillion formula units of A have a mass of 4.26 milligrams. 47.9 grams of substance B contain 5.36 grams of hydrogen and 42.5 grams of oxygen. When 10.0 grams of C is burned in excess oxygen, 33.8 grams of carbon dioxide and 6.92 grams of water are produced. A mass-spectrum of substance C shows a parent molecular ion with a mass-to-charge ratio of 26. (This means that the molar mass is some whole number multiple of 26 g/mole). Substance D is the hydroxide of the metal in substance A.
Calculate the amount (mL) needed of a 4.0 M phenylmagnesium chloride in THF solution to give 1.5 equivalents based on the amount of starting material used. Starting material needed
consider the given case as first anionsnbsp will not precipitate in the presence of agno3 and second anions get
Calculate the mass, in grams, of Ag2CrO4 that will precipitate when 50ml of 0.20M AgNO3 solution is mixed with 40ml of 0.10M K2CrO4 solution. Assume that Ag2CrO4 is completely insoluble (its Ksp is ~ 0).
Determine the cell reaction, the standard cell potential (E0cell) and the half-cell that acts as the cathode for the voltaic cells composed of the following half-cells.
210 mg Ca(OH)2 and 210 Al(OH)3. A 8.3×10^-2 M HCl, which is similar to stomach acid, is used to neutralize 5.0mL of liquid antacid. How many mililiters of HCl solution are needed to neutralize Ca(OH)2, then Al(OH)3?
Write the balance equation and predict the moles of ammonia that can be made using usng 22.4g of nitrogen and an unlimited amount of hydrogen
what is the fundamental mechanism by which enzymes enhance the rate of chemical reactions?
How many grams of water at 0 degrees C could be frozen to ice at 0 degrees C by the evaporation of 58.82 mol NH3?
a balloon is filled to a volume of 7.0 102 ml at a temperature of 39.0degc. the balloon is then cooled at constant
aqueous solutions of ironiii chloride and sodium hydroxide are mixed together to form a combined solution that is 0.015
A buffer may be prepared by mixing a weak acid with a roughly equivalent amount of strong base. Which of the acids below is best for the preparation of a buffer with a pH of 4.00
A weak acid (HA) is found to ionize 17.8% when mixed at a concentration of 0.3 mol/L. What is the value of Ka for this acid?
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