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An empty Erlenmeyer flask weighs 252.3 g. When filled with water (d = 1.00 g/cm3), the flask and its contents weigh 503.3 g.(a) What is the flask's volume?
what is the maximum number of grams you could obtain if you recrystallize 28 g of cholesterol from 100 mL of methanol
Assume you have a mixture of gases that contains 3.50 L of helium, some argon at 1.03 atm, and some neon at 27 degrees C. For which gas(es)
A 25.0-mL sample of potassium chloride solution was found to have a mass of 25.115g. When the solution was heated to dryness, the mass of the solute residue was 0.252g. Calculate the (a)mass/mass % concentration and (b) molar concentration.
How many grams of magnesium metal will react completely with 4.8 liters of 5.0 M HCl?
1. if in annbsp solution of aqueous sulfuric acid h2so4 hydronium ion concentration is 4 times the concentration of
At the endpoint of a titration of a weak acid HA (nicotinic acid) with NaOH (100 mL each, 0.100 M), the pH is 8.78. What is the apparent Ka of the acid
What is the concentration of the compound in the cuvet? What is the concentration of the compound in the 10-mL flask?
a mass of 2.50 g of hydrated copper sulfate is placed in a crcible and heated. on heating, 1.59 g of white anhydrous copper sulfate is left behind. determine the ratio of water to copper sulfate.
Calculate the osmotic pressure generated when 14.6 grams of estrogen are dissolved in 275 ml of a benzene solution at 298 K. What is the molarity and osmotic pressure
Following is an example of a triprotic acid with pK values closer than 3 units, and pK3 less than 10. You have a 20.0 mL solution of the triprotic acid, H3A, with a concentration of 0.128 M, and are titrating it with a 0.250 M solution of NaOH.
Consider the following balanced thermochemical equation for the decomposition of the mineral magnesite: MgCO3(s) => MgO(s) + CO2(g) ?Hrxn = 117.3 kJ What is ?H in kJ when 28.87 g of CO2 reacts with excess MgO?
190 ml of an hcl solution with ph of 2.60 is added to 200 ml of an hno3 solution. the resulting ph is 1.40. what was
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