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The 0.500 M solutions of Na2CO3 and CaCl2 were prepared ahead of time. The CaCl2 is purchased in the hydrated form; it contains one mole of water for each mole of the compound, Na2CO3 * H2O, and has a formula weight of 124.01 g/mol. To prepare 100 mL of a 0.500 M solution of this hydrated form requires 0.0500 moles of this salt. Calculate the grams of this compound that equals 0.0500 moles, showing all your calculations.
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the formal charges of all atoms in the correct structure of ClO4-
Consider a glass of 298 mL of water at 30°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved.
The pressure of 9.0 L of an ideal gas in a flexible container is decreased to one-eighth of its original pressure, and its absolute temperature is decreased to one-forth of the original. What is the final volume of the gas?
How reliable is the perfect gas law in comparison with the van der Waals equation? Calculate the difference in pressure of 10.00g of CO2 confined to a volume of 100cm3 at 25 degrees Celsius between treating it as a perfect gas and a van der Waals ..
How much HCl is produced from the reaction of an excess of HSbCl4 with 3 moles H2S in the following reaction? HSbCl4 + H2S ! Sb2S3 + HCl
Commercial electrolytic cells for producing aluminum operate at 5 volts and 100,000 Amperes. How long does it take to produce 1000 kilograms of aluminum
In a chemical cold pack, two substances are kept separate by a divider. When the divider is broken, the substances mix and absorb heat from the surroundings. The chemical cold pack feels cold.
The reaction is allowed to reach equilibrium. At equilibrium the number of moles of B is 18.32. Calculate the equilibrium constant for the reaction A (g) + 2B (g) reacting with 3 C(g)
how would each affect the calculated molecular mass of the solute?
if 5.00 g of each NH3, O2, and CH4 are reacted, what mass of HCN will be produced, assuming 100% yield
what is the phase of matter of the solute and solvent of sterling silver?
How many equivalent resonance forms can be drawn for SO2 without expanding the octet on the sulfur atom? (A) 0 (B) 1 (C) 2 (D) 3 (E) 4 17. In which of these species does the first atom in the chemical formula violate the octet rule? 18. How many e..
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