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How much heat is absorbed by a 125g sample of water when it is heated from 25.200C to 32.800C? The specific heat of water is 4.184 J/g0C.
What mass in grams of carbon dioxide is produced if 85.0 mol of magnesium carbonate, MgCO3, are heated and allowed to decompose according to this equation? MgCO3(s)--> MgO(s) + CO2(g)
Calculate the theoretical and percent yields, b: 20.0g of NaHCO3 is heated to form Na2CO3. Calculate the theoretical loss in weight on heating
how much energy in kilojoules is required to change 47.6 g of ice at 0 degrees celcius to liquid water at the same temperature in kilocalories?
An aqueous copper(II) sulfate solution is electrolyzed for 3 hours with a 1.8 ampere current
A 23.1 g sample of pure iron at 95°C is dropped into 78 g of water at 17°C. What is the final temperature of the water-iron mixture?
An ionic solution is investigated for identity. Using the following clues, identify the cation and the anion in the solution: a. There is only one cation and one anion in the solution
A certain second-order reaction (B--> products) has a rate constant of 1.40×10^-3 M^-1*s^-1 at 27 Celsius and an initial half-life of 280s . What is the concentration of the reactant B after one half-life?
Calculate the heat energy released when 29.0 g of liquid mercury at 25.00 C is converted to solid mercury at its melting point
Describe the preparion of 1.00 liters of a 1.00 M acetate buffer, pH 6.00, starting from a 17.40 N solution of glacial acetic acid
Calculate the volume (in mL) of He collected at STP when 3.60 g of pure 226Ra is stored in a closed container for 135 years.
Sodium sulfate dissolves as follows: Na2SO4(s) 2Na+(aq) + SO42- (aq). How many moles of Na2SO4 are required to make 1.0 L of solution in which the Na concentration is 0.10 M.
Discuss how to find the molar mass of a compound, percent composition of the elements of a compound and how to determine the empirical and molecular formulas from percent composition.
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