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If a raindrop weighs 57 mg on average and 5.1 X 10^5 raindrops fall on a lawn every minute, what mass of rain falls (in kg) on the lawn in 1.5 hours?
A 28.0-g sample of water at 260. K is mixed with 51.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings
HCl + NaOH = NaCl + H2O If 200 mL of a .20 M HCl solution is consumed in the above reaction, how many grams of each product would be produced.
Determine which flask has the smallest amount of water vapour and which one has greater vapor pressure of H 2 O?
determine at what pressure will pure H 2 O start to boil if its temperature is seventy five degree Celsius
When pure carbon burns in air, 10.0 kg of carbon react with the oxygen in the air to form 36.7 kg of carbon dioxide. Calculate the percentage of oxygen contained in carbon dioxide.
Suppose that a sample of gas occupies 192 mL of volume at 25C and a pressure of 206 torr. What would be the volume if the pressure were changed to 506 torr at 25C.
Determine the empirical and molecular formulas of Ibuprofen has 75.69% C, 8.80%H and 15.51%O by mass and has a molar mass about 206g/mol.
Calculate the molar concentration of OH- ions in a 0.550 M solution of hypobromite ion (BrO-; Kb=4.0 x 10^-6). What is the pH of this solution?
Compute the final temperature of the mixture (assuming no heat loss to the surroundings). The heat capacities of H2O(s) and H2O (l) are 2.08 and 4.18 J/g · °C, respectively, enthalpy of fusion for ice = 6.02 kJ/mol.
How many atoms of neon occupy a volume of 14.3 L at STP.
Which corresponds to approximately 2.65 * 104 mol of electrons at the voltage of a fuel cell and calculate how much heat energy is absorbed?
Gas stoichiometry and Percentage of calcium carbonate in the sample
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