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A 0.1105 g sample of primary standard grade Na2CO3 (M.M. = 105.99) was dissolved in 55 mL of distilled H2O. The solution required 22.18 mL of the HCl solution to reach the methyl orange end point. a. Calculate the number of mmoles of primary standard grade Na2CO3. b. How many mmoles of HCl reacted with the Na2CO3? c. Calculate the molarity of the HCl solution.
a balloon filled with helium gas at 1.00 atm occupies 15.6 L. What volume would the balloon occupy in the upper atmosphere, at a pressure of .15 atm
Explain Coronary Artery Disease: Good and Bad Cholesterol, A middle-aged man has been diagnosed as being at high-risk of developing Coronary Artery Disease.
Calculate the molar heat of neutralization (in kJ mol-1). The heat capacity of the calorimeter is 10 cal/g·0C.
What is the minimum mass of sulfur dioxide necessary to produce 200. grams of sulfuric acid in the reaction?
Ethylene glycol, HOCH2CH2OH, is effective as an antifreeze, but it also raises the boiling temperature of automobile coolant, which helps prevent loss of coolant when the weather is hot.
If a sample of 0.188 grams of KCN is treated with an excess of HCL, calculate the amount of HCN formed, in grams.
Describe in 75 words the structure of the carbon atom. What types of bonds does carbon form and why?
A pound of coffee beans yields 70 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans.
For the following reaction, label the acid, base, conjugate acid, and conjugate base. Given the following values for Ka, circle the stronger acid and stronger base and predict whether the equilibrium is toward the reactants or products.
When steam (hot water) is passed over iron, hydrogen gas and iron (3) oxide are formed. What weight of steam would be needed to react completely with 100.0g of iron.
a saline solution contains 150 mEq/L each of Na+ and Cl- how many moles of Na+ and Cl- are in 2.50L of the solution
At 700 K the equilibrium constant for the reaction is Kp = 0.76. CCl4(g)-> C(s) + 2 Cl2(g) A flask is charged with 2.00 atm of CCl4, which then reaches equilibrium at 700 K. (a) What fraction of the CCl4 is converted into C and Cl2?
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