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A quantity of 4.00 102 mL of 0.600 M HNO3 is mixed with 4.00 102 mL of 0.300 M Ba(OH)2 in a constant-pressure calorimeter of negligible heat capacity. The initial temperature of both solutions is th
A student gently drops an object weighing 15.8 g into an open vessel that is full of ethanol, so that a volume of ethanol spills out equal to the volume of the object. The experimenter now finds tha
You must make 100 ml of 0.25 M HCl to do a DNA extraction experiment. How much of the 37.0% HCl concentration stock do you need to prepare the solution?
A volume of 60.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 24.7mL of 1.50 M H2SO4 was nee
Nitric acid is usually purchased in concentrated form with a 70.3% HNO3 concentration by mass and a density of 1.14% g/ml. How much of the concentrated stock solution in milliliters should you use t
Sulfuric acid is a very strong inorganic used in commercial and non-commercial laboratories. What is the molarity of a 70.00 wt % solution of sulfuric acid in water? The density of
A 250.0ml sample of air at 100.0 K is warmed to 200.0 K at constant pressure.What is the volume of the air sample at the new temperature .
what is the empirical formula for a substance if a 1.000 g sample of it contains .262 grams of nitrogen 0.075 grams of hydrogen and.663 grams of chlorine?
What is the molality of chromium(III) chloride in a solution prepared by dissolving 75.2 g chromium(III) chloride hexahydrate (CrCl3· 6H2O) in 250.0 g of water.
If a solution is made by adding 83 grams of sodium hyroxide to 750 ml of water what is the percent by mass of sodium hydroxide in this solutions ?
At 340 K, Kp = 69 for the reaction H2(g) + I2(g) -> 2HI(g). 50.0 g of HI is injected into an evacuated 5.00-L rigid cylinder at 340 K. What is the total pressure inside the cylinder when the syst
If 3.42 g of K2PtCl4 and 1.61 g of NH3 give 2.02g of cisplatin (K2PtCl4+2NH3→2KCl+Pt(NH3)2Cl2), what is the percent yield of the reaction?
If a balloon containing 1,200 L of gas at 25°C and 760 mmHg pressure ascends to an altitude where the pressure is 380 mmHg and the temperature is 54°C, what the volume will be: (Be sure to u
Hydrochloric acid reacts with zinc metal to form zinc chloride and hydrogen gas. If 345.2 g of zinc metal reacts with 231.6 grams of acid. How many liters of hydrogen gas are produced? How many mole
Suppose you inserted a piece of an unknown metal into a solution of zinc (II) nitrate and observed no reaction. Then if you inserted the unknown piece of the metal into the solution of iron (III) ch
A 2.63 L flask is filled with carbon monoxide at 27°c until the pressure is 6.72 ATM. Calculate the total pressure after 2.89 moles of carbon dioxide has been added to the flask.
A volume of 12.8 L is occupied by 0.57 mol of helium gas. What is the volume of 0.78 mol of helium gas under the same conditions?
How many grams of the excess reactant are left over according to the reaction below given that you start with 10.0 g of Al and 19.0 grams of O2? Reaction: 4Al + 3O2 → 2Al2O3 *
How, Explain how dissolving the Group IV carbonate precipitate with 6M CH3COOH, followed by the addition of extra acetic acid
Limiting molar conductivities, limiting molar conductivities of Na2SO4, HCL and NaCl and 859.2, 450 and 128.1. what is the limiting conductivity of H2SO4
Law of multiple proportion, name the law of chemical combination illustrated by the pair of compounds co and co2 with statement of with explamation
If the ball (m = 0.142 kg) and bat are in contact for a time of 8.1 ms, what is the magnitude of the average force of the bat on the ball?
From the time your sister started pulling, how long do you have to intervene before the turkey goes over the edge? Neglect friction.