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A sample of an element has a volume of 81 mL and a density of 1.73 g/mL. What is the mass in grams of the sample (round to the nearest tenth)?
Compute the pH of a solution made by mixing 67 grams of sodium acetate, NaCH 3 COO, to 37 g of acetic acid, CH 3 COOH, and dissolving in H 2 O to form 300. mL of solution ?
Given the reaction 2C2H2(g) + 5O2(g) ->4CO2(g) + 2H2O(g) , how much oxygen gas is needed for the complete combustion of 167 g of acetylene (C2H2)? Answer in units of g
HClO is a weak acid (Ka = 4.0 × 10-8) and so the salt NaClO acts as a weak base.
A 325-mL sample of solution contains 25.3 g of CaCl2, which is fully dissolved. Calculate the molar concentration of Cl- in this solution.
Identifying An Unknown Liquid And Precipitate. A high-boiling bp = 202 - 204 degrees C, burns with a yellow, sooty flame. Sodium fusion indicates that halogens, nitrogen and sulfur are not present. It is not soluble in water, dilute sodium bicarbo..
calculate the mass of ammonium nitrate that should be heated to obtain 100 mL of dinitrogen oxide, N2O, at 1.00 atm and 25 degrees celcius?
Concentrated hydrochloric acid is 38% HCl by weight and has a density of 1.19 g/mL. A solution is prepared by measuring 25 mL of the concentrated HCl,
How is the ideal gas law modified to account for the finite volume of molecules? The temperature of the sea bed 60 m below the surface and at the surface are both 20C. A rubber balloon is inflated at the sea bed with 2.0 mole gas neglecting the wo..
Calculate the amount of heat liberated (in kJ) from 375 g of mercury when it cools from 89.2°C to 15.7°C
a helium-filled weather balloon is launched from the ground where the pressure is 752 mmHg and the temperature is 21 degrees celsius. under these conditions its volume is 75.0 L.
If 348 grams of K2SO4 (molar mass 174 grams) is dissolved in enough water to make 500 milliliters of solution, what are the concentrations of the potassium and sulfate ions.
A buret containing NaOH solution has an initial reading of 0.14ml. 25.00ml of 0.1000M HCl is titrated to a phenolphthalein end point,
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