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The most common source of copper is the mineral chalcopyrite. How many kilograms of chalcopyrite must be mined to obtain 320. of pure copper?
In a gas mixture the partial pressures are nitrogen 425 torr, oxigen 115 torr, and hellium 225 torr. What is the total pressure (atm) exerted by the gas mixture?
Calculate the theoretical yield of aspirin to be obtained, starting with 2.0 g of salicylic acid. 2. If 1.8 g of aspirin were obtained in this experiment, what would be the percent yield?
although even more strained than cyclopro-panone, is nevertheless quite stable and can even be distilled. Explain, taking the polarity of the carbonyl group into account.
A 347 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 630. mmHg. Calculate the moles of Ar present.
Determine the molecular formula of the compound with molar mass 336.5g mol-1 and empirical formula C 5 H 8 O?
Calculate the molarity of each of the following solutions: (a) 29.0 g of ethanol (C2H5OH) in 545 mL of solution, (b) 15.4 g of sucrose (C12H22O11) in 74.0 mL of solution, (c) 9.00 g of sodium chloride (NaCl) in 86.4 mL of solution.
A mixture of 70 mole% butane and 30 mole % hyrdrogen is burned with excess air. Fractional conversion of 85% of the butane and 90% of the hydrogen are achieved
A tank of hydrogen has a volume of 22.9 L and holds 14.0 mol at 12.0 C, what is the pressure of the gas in atm
The temperature inside my refrigerator is about 40 Celsius. If I place a balloon in my fridge that initially has a temperature of 220 C and a volume of 0.5 liters
What is the molarity of a solution if 4.50 g NaF is dissolved in enough water to make 250.0 mL of solution?
Sodium carbonate reacts with hydrochloric acid as shown below in an unbalanced chemical equation. What mass of CO2 is produced from the reaction of 2.94g Na2CO3 with excess HCL
Calculate the force of attraction (in N) between a cation with a valence of +2 and an anion with a valence of -2
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