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A 0.5118g sample of CaCO3 is dissolved in a 12 M HCl and the resulting solution is diluted to 250.0mL in a volumetric flask.
How many moles of CaCO3 are used (formula mass=100.1)?
What is the molarity of the Ca²? in the 250mL solution?
How many moles of Ca²? are in a 25.00mL aliquot of the solution in 1b?
250 mL of a NaCl solution is treated with excess AgNO3 and all the Cl- is precipitated as 5.78 g of AgCl. What was the concentration of the original NaCl solution
Calculate the difference between the molar enthalpy and the molar internal energy of carbon dioxide regarded as an ideal gas at 298.15K and 754 mmHg
A sample of H2 gas (2.0 L) at 3.5 atm was combined with 1.5 L of N2 gas at 2.6 atm pressure at a constant temperature of 25 °C into a 7.0 L flask
When 3.41 g of P4 is burned, 86.1 kJ of thermal energy is evolved at constant pressure. What is the molar enthalpy of combustion of P4?
What are the steps to recrystallize an impure solid? Answer 1. Heating the water. 2. Dissolving the solute.3. Letting the solute cool.4. Collecting and washing the crystals.
a cook wants to heat 1.89 kg of water from 31.0 c to 100.0 c if he uses the combustion of natural gas which is
Small amounts of hydrogen gas are often produced by reaction of zinc with HCl; Zn(s) + 2 HCl(aq) ® H2(g) + ZnCl2(aq) How many liters of H2 gas, collected over water at a pressure of 176.6 mm Hg and temperature of 22.00 °C
The rate of substitution of alkyl chlorides and alkyl bromides can be increased by adding a catalytic amount of sodium iodide.
when cyclopentane is exposed to br2 in the presence of light reaction occurs. write the formulas of all possible
nbspo2 make up of 46.7 percent by mass of earths crust. if a sample of earths crust has a mass of 325 grams then
Given that the density of aluminum is 2.70g/cm^3, What maximum length of aluminum lil can be made from 1.10 kg of aluminum?
Calculate the molarity of a solution prepared by diluting 32.74 mL of 0.615 M ammonium sulfate to 490.0 mL.
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