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03-15-2008, 07:28 PM
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| Chemistry "Help"? 1. What is the maximum amount of KCl that can dissolve in 200 g of water? (The solubility of KCl is 34 g/100 g H2O at 20°C.) 17 g 34 g 68 g 6800 g 2. For most solids, which of the following occurs as temperature increases? Solubility decreases. Solubility increases. Solubility remains the same. Molarity doubles. 3. If the solubility of a gas in water is 4.0 g/L when the pressure of the gas above the water is 3.0 atm, what is the pressure of the gas above the water when the solubility of the gas is 1.0 g/L? 0.75 atm 1.3 atm 4.0 atm 12 atm 4. What is the molarity of a solution that contains 6 moles of solute in 2 liters of solution? 6 M 12 M 7 M 3 M 5. What mass of Na2SO4 is needed to make 2.5 L of 2.0 M solution? (Na = 23 g; S = 32 g; O = 16 g) 178 g 284 g 356 g 710 g 6. The volume of 6.00M HCl needed to make 319 mL of 6.80M HCl is ____. 0.128 mL 7.8 mL 281 mL 362 mL      |
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