Find final temperature of water after preceding reaction
A 5.08-g chunk of potassium is dropped into 1.06 kg water at 24.0°C. What is the final temperature of the water after the preceding reaction occurs? Assume that all the heat is used to raise the temperature of the water.
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What mass (in grams) of steam at 100°C must be mixed with 387 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 26.0°C?
Calculate the pH of a buffer made with 0.50M phosphoric acid and 0.75M sodium dihydrogen phosphate. Ka = 7.5 x 10^-3
In the formula sodium phosphate (Na3PO4) how many moles of sodium are represented? How many moles of phosphorus? How many moles of oxygen?
Assume a future where security countermeasures against DoS attacks are much more widely implemented than at present. In this future network, antispoofing and directed broadcast filters are widely deployed.
What is the final temperature of the water after the preceding reaction occurs? Assume that all the heat is used to raise the temperature of the water.
A railway wagon weighing 40 KN and moving with a speed of 8 km/h is stopped by a buffer of 4 springs whose allowable maximum compression is 150 mm.
What are the partial pressures of CCl4 and Cl2 at equilibrium?
When 0.250 mol of CH4(g) reacts with excess Cl2(g) at constant presure according to the chemical equation shown bellow, 177 kJ of heat are realesed. caculate the value of change of heat for this reaction?
The solubility of O2(g) in water is 4.43 mg of O2/100g H2O at 20oC and 1 atm pressure. What pressure of O2(g) would be required to produce a saturated solution that is 0.010 M O2?
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