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What is the molarity of a solution made by dissolving .34 moles of NaCl in 455 mL of water?
Determine the number of ammonia molecules in 4.85g of ammonia (NA= 6.022 x 1023 mol-1).
Consider a binary liquid mixture A and B, where A is volatile and B is nonvolatile. The composition of the solution in terms of mole fraction is xA = 0.045 and xB = 0.955
25.0 ml of a 0.2450 M NH4Cl solution is added to 55.5ml of 0.1655 M FeCl3. What is H concentration of chloride ion in the final solution.
Write an equation for the formation of an acetal from reaction of excess methanol with benzaldehyde in the presence of an acid catalyst.
A student ran the following reaction in the laboratory at 689 K H2(g) + I2(g) 2 HI(g)
A nugget of pure gold of 4.80 grams is absorbed 284 Joules of heat. if the initial temperature was twenty eight degree Celsius then what was the final temperature of the Au? The specific heat of gold = 0.129 J/(g·°C)?
Determine the final temperature of the mixture. (Use 1g/mL as the density of water)
The half-life of a certain radioactive element is 1,250 years. What percent of the atoms remain after 7,500 years?
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
How many grams of F2 are needed to produce 120. g of PF3 if the reaction has a 78.1% yield?
When gaseous nitrogen,hydrogen & ammonia are mixedin a closed vessel at room temperature no apparent change in the concetrations of regardless of the original amount of gases.
total of 2.00 moles of a compound is allowed to react in a foam coffee cup that contains 122 gm of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7
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